Probs_1_1

04. Convert 1 GJ (Gigajoule) to BTU (British Thermal Unit) a) 948,000 b) 1,200,000 c) 1,000,000 d) 886,000 05. Convert 100 deg C to deg Kelvin a) 373 b) 56 c) 212 d) 672 06. Convert the energy of , 1 Joule to erg a) 10,000,000 b) 10,000 c) 1,000 d) 100 07. Convert the energy of 1 Joule to calorie a) 0.239 b) 1,000 c) 0.001 d) 100 08. Convert the energy of 1 Joule to Watt-second a) 1 b) 1,000 c) 0.001 d) 100 09. Convert the energy of 1 Joule to Newton-meter a) 1 b) 10

c) 0.001 d) 100 10. Convert the energy of 1 megawatt –hour (MW-hr) to gigajoule (GJ) a) 3.6 b) 3,600 c) 3,600,000 d) 1,341 11. Convert the energy of 1 megawatt-hour (MW-hr) to megajoule (MJ) a) 3,600 b) 3.6 c) 3,600,600 d) 1,341 12. Convert the energy of 1 MW-hr to horsepower-hour (HP-hr) a) 1,341 b) 3.6 c) 3,600,000 d) 3,600 13. Convert the energy of 1 megawatt-hour (MW-hr) to megacalorie (MCal) a) 860 b) 3.6 c) 1,341 d) 3,600 14. Convert the energy of 1 watt-hour (W-hr) to foot-pounds (ftlbs) a) 2,655

b) 3,600 c) 3.6 d) 3.412 15. Convert the energy of 1 BTU to kilojoule (KJ) a) 1.055 b) 0.293 c) 0.525 d) 778 16. Convert the energy of 1 BTU to foot-pounds(ft-lb) a) 778 b) 0.293 c) 252 d) 1,055 17. Convert the energy of 1 BTU to poundal foot a) 25,037 b) 0.293 c) 252 d) 1,055

c) 15 d) 18 20. Convert 1 Boiler Horsepower (BoHP) to BTU/hr a) 33,480 b) 35,00 c) 25,000 d) 30,000 21. Convert 1 Electric Horsepower to ft-lbs/sec a) 550 b) 2545 c) 33000 d) 746 22. Convert the 1 Electric Horsepower to Kilowatt (KW) a) 0.746 b) 1.000 c) 0.800 d) 0.900

18. Convert the energy of 1 BTU to calorie (cal) a) 252 b) 0.293 c) 0.525 d) 1,055

23. Convert 1 KW to BTU/Hr a) 3413 b) 2545 c) 33480 d) 4400

19. Convert 1 Boiler Horsepower (BoHP) to electric Horsepower a) 13.15 b) 12

24. Convert 1 Electric Horsepower to Boiler horsepower (BoHP) a) 0.076 b) 1.000

c) 0.800 d) 0.900 25. Convert 1 Electric Horsepower to pferdestarke (PS) a) 1.014 b) 1.100 c) 0.900 d) 0.800 POWER PLANT DESIGN 79. What should be the design capacity of a Coal Storage warehouse for a 50 MW coal-fired power plant if coal consumption rate is 0.48 mt/MW of power produced if 1 month inventory is desired in MT? Assume plant running 720 hours per month at rated capacity. A. 17,280 B. 20,280 C. 18,280 D. 18,280 80. A fertilizer company is proposing to put up a 15 MW coal-fired industrial boiler operating at 42 kgs/sq cm gage to run a fullcondensing steam turbine having a steam rate of 5 mt/MW power and 10% of steam generation is used for auxiliaries. What is should be the minimum nameplate capacity of the boiler? MT/HR A. 83.33 B. 80.00 C. 75.00 D. 70.00

81. A Daerator of a 200 MTPH CFB boiler uses Low pressure steam. Design data are as follows: 1. Feedwater flow to deaerator is at 71.5 deg C and enthalpy of 299.16 kJ/kg 2. LP steam, X mtph at 1.61 bars, 129 deg C and enthalpy of 2,719 kJ/kg 3. Feedwater out of daerator is 128 deg C, 538 kJ/kg, 250 mtph What is the LP steam requirement? MTPH. A. B. C. D.

24.7 20.7 16.7 12.7

82. A HP Heater for a 200 MTPH CFB boiler is used to heat feedwater before entering the boiler economizer. Design data are as follows: Feedwater In - 250 mtph, 15.1 MPa, 130 deg C, enthalpy is 555 kJ/kg Feedwater out - 250 mtph, 15.0 MPa, 185 deg C, enthalpy is 795 kJ/kg Steam In - 1.3 MPa, 195 deg C and enthalpy of 2,789 kJ/kg Condensate Out - 1.1 MPa, 188 deg C and enthalpy of 799 kJ/kg What is the Steam required for the HP heater? KG/HR.?

A. B. C. D.

30,150 20,150 25,150 35,150

83 A co-gen coal-fired plant in Pampanga has the following design data: 1. Input heat from coal (HHVar = 5900 kcal/kg) = 167,400 kw 2. Turbine-generator output = 45,000 kw 3. Useful heat from process steam =52,000 kw From above data, What is the Plant Thermal Efficiency? % A. B. C. D.

57.9 46.3 52.1 26.9

84. In a coal-fired power plant in Pampanga, HP steam at 125 kg, 541 deg C may be diverted to a PRV/Desuperheater station to produce process steam at 12.5 kg, sat (193.4 deg C) by adding high pressure feedwater from the Daerator at 130 deg C. Given the following design data, What is the feedwater required in kgs/hr to be added to produce 73,000 kg/hr of 12.5 kg/cm2g saturated steam for process use?

Use the following reference design data below: 1. Enthalpy of HP steam at 125 kg, 541 deg C = 3,452 kJ/kg 2. Enthalpy of HP feedwater at 150 kg, 130 deg C = 555 kJ/kg 3. Enthalpy of LP steam at 12.5 kg, saturated = 2,788 kJ/kg A. 16,730 B. 15,060 C. 18,400 D. 13,500 85. In a coal-fired power plant in Pampanga, HP steam at 125 kg, 541 deg C may be diverted to a PRV/Desuperheater station to produce process steam at 12.5 kg, sat (193.4 deg C) by adding high pressure feedwater from the Daerator at 130 degC. Given the following design data, What is the HP steam entering the PRV/Desuperheater to produce 73,000 kg/hr of 12.5 kg/cm2g saturated steam for process use. Kgs/hr Use the following reference design data below: 1. Enthalpy of HP steam at 125 kg, 541 oC = 3,452 kJ/kg o 2. Enthalpy of HP feedwater at 150 kg, 130 C = 555 kJ/kg 3. Enthalpy of LP steam at 12.5 kg, saturated = 2,788 kJ/kg A. B. C. D.

56,270 59,940 61,900 59,500

86. Feedwater entering the economizer of a 200 MTPH CFB boiler has an enthalpy of 795 kJ/kg and steam is produced at 125 bars, 541 deg C has an enthalpy of 3,440 kJ/kg. If 24,473 kgs/hr of coal with an HHVar of 5900 kcal/kg (24,703 kJ/kg), What is the Design Boiler Efficiency? % A. 87.5 B. 85.0 C. 90.0 D. 82.5

87. In the design fuel specification of a coal-fired power plant the following were specified: Total moisture (TM) = 12% Inherent moisture (IM)= 6% As received HHVar =5900 kcal/kg Air-dried HHVad = 6300 Kcal/kg What is the coal bone-dry heating value, HHVbd, in Kcal/kg? A. 6,700 B. 5,900 C. 6,200 D. 5,700

88. The coal for a power plant has a total moisture of 26.23% and a HHVar = 4,821 Kcal/kg. The inherent moisture of air-dried coal is 15.08%. What is the HHV? (Air-dried HHV) per Kg coal? Kcal/Kg

a. 5,550 b. 5,000 c. 5,750 d. 6,000 89. A Torishima multi-stage centrifugal pump is used as boiler feed pump in a coal-fired power plant in the Visayas. Flow is 1,612 gpm and TDH is 5,615 ft, What is the KW load if pump efficiency is 80% and motor efficiency is 90%? KW a. 2,368 b. 1,894 c. 1,700 d. 2,100

90. A Torishima boiler feed pump is used to provide 80 cu.m./hr of boiler feedwater at a head of 55 barg (550 m). What is the pump motor load in KW if pump efficiency is 75% and motor efficiency is 90%? :

a) 178 b) 198 c) 218 d) 238

91. The circulation pump of a forced-circulation boiler has a capacity of 607 cu.m./hr and 20 m TDH. What is the load on the motor if overall pump efficiency is 55%? % a) 60 b) 65 c) 70 d) 55

92. Condensate pumps rated at 105 MTPH and total head of 305 m is used for a condenser. Condensate temperature is 39 deg C. What is the load of the motor if pump efficiency is 75% and motor efficiency is 90%? KW a) 129 b) 119 c) 109 d) 139 93. A condensate pump rated at 105 MTPH and total head of 305 m is used for a condenser. Condensate temperature is 39 deg C. What is the nearest motor KW rating if pump efficiency is 75%, motor efficiency is 90% and motor is loaded at 81% of rating? KW a) 160 b) 170 c) 150 d) 140 94. A 300 TPH CFB coal-fired boiler with 90% efficiency produced steam at 126.5 barg, 541 deg C steam (3450 KJ/kg enthalpy) from feedwater entering the boiler at 220 deg C (KJ=944 KJ/kg). If coal fuel has an HHV of 4,250 Kcal/kg (17,479 KJ/kg), What is the coal consumption per hour? Kcal/kg a) 47.8 b) 42.8 c) 37.8 d) 52.8

95. A 300 TPH CFB coal-fired boiler produced steam at 126.5 barg, 541 deg C steam (3450 KJ/kg enthalpy) from feedwater entering the boiler at 220 deg C (KJ=944 KJ/kg). If coal (HHV = 17,479 KJ/kg) consumption is 47.8 MTPH, What is the boiler efficiency in %? a) 90 b) 88 c) 86 d) 84 96. A 300 TPH CFB coal-fired boiler with 90% efficiency, produced steam at 126.5 barg, 541 deg C steam (3450 KJ/kg enthalpy) from feed water entering the boiler at 220 deg C (KJ=944 KJ/kg). If coal consumption is 47.8 MTPH, What is the required coal HHV in KJ/kg? a) 17,479 b) 18,479 c) 19,479 d) 16,479 97. A coal-fired power plant in Toledo City requires 0.59 kg coal per kwhr produced. If coal HHV is 17,479 KJ/kg, What is the % plant thermal efficiency in %? a) 34.9 b) 36.9 c) 30.9 b) 32.9 98. A coal-fired power plant in Toledo City operates at a plant thermal efficiency of 34.9%. If coal HHV is 17,479 KJ/kg, What is the coal consumption in Kg/kwhr?

a) 0.59 b) 0.49 c) 0.39 d) 0.69 99. A 210 MW coal-fired power plant operating at the Phividec Industrial Estate in Misamis Oriental uses bituminous coal of HHV ar = 4,896 Kcal/kg with 26% total moisture. What would be the equivalent heating value per kg in (Kcal/kg) of bone-dry coal? a) 6,616 b) 6,116 c) 5,616 d) 7,116 100. A 116 MW coal-fired power plant operating at the Phividec Industrial Estate in Misamis Oriental uses a steam condenser that has a capacity of 249 mtph of exhaust steam (2361.4 KJ/kg enthalpy). Condensate produced is at enthalpy of 155.2 KJ/kg. Cooling water is 360 cu.m/min entering the condenser at 30 deg C. What is the temperature of the cooling water leaving the condenser? Deg C a) 36 b) 38 c) 40 d) 34

101. A seawater pump is used to supply cooling water to a steam condenser for a power plant. Flow rate is 22,000 cu.m./hr with a TDH of 18.7 meters. Pump has a pump efficiency of 86% and its motor efficiency is 90%. What is the nearest motor rating for this pump? KW a) 1500 b) 1300 c) 1200 d) 1750 102. A condensate extraction pump for a coal-fired power plant is used to transfer condensate from the hotwell to a daerator. Flow rate is 374 mtph with a TDH of 180 meters. Pump has a pump efficiency of 68% and its motor efficiency is 90%. What is the nearest motor ratingin KW for this pum? a) 300 b) 250 c) 200 d) 400 103. A power plant has 2 boiler feed pumps each rated at 220 metric tons per hour each unit. TDH is 1990 m at feedwater SG of 0.905, pump efficiency is 76% and motor efficiency is 90%. What is the motor load in KW? a) 1,744 b) 1,644

c) 1,544 d) 1,444 104. A low pressure (LP) feedwater heater for a power plant uses 1 barg of steam (latent heat = 2201 KJ/kg steam) for heating 350 mtph of feedwater from 30 deg C to 120 deg C. What is the heating steam required? KG/HR. a) 59,923 b) 60,923 c) 58,923 d) 57,923 105. A high pressure (HP) feedwater heater for a power plant uses 1.84 barg of steam (latent heat = 2168 KJ/kg steam) for heating 350 mtph of feedwater from 120 deg.C to 135 deg C. What is the heating steam required? KG/HR. a) 10,139 b) 11,139 c) 12,139 d) 9,139

106. A high pressure (HP) feedwater heater for a power plant uses 1.56 barg of steam (latent heat = 2178 KJ/kg steam) for heating 350 mtph of feedwater from 135 deg C to 205 deg C. What is the heating steam required in MTPH?. a) 47.1 b) 57.2 c) 37.1 d) 27.1

107. The final high pressure (HP) feedwater heater for a power plant uses 4.7 MPag of steam (latent heat = 1654 KJ/kg steam) for heating 350 mtph of feedwater from 205 deg C to 260 deg C. What is the heating steam required in MTPH? a) 48.7 b) 58.7 c) 38.7 d) 28.7 108. A coal-fired power plant in Mindanao has a net heat rate of 10,500 KJ/kwhr. What is the overall plant thermal efficiency? %. a) 34.29 b) 36.29 c) 38.29 d) 32.29 109. A coal-fired power plant in Mindanao has a overall plant thermal efficiency of 34.29%. What is the plant HEAT RATE in KJ/kwhr? a) 10,499 b) 11,499 c) 9,499 d) 8,499 110. A power plant using coal (HHV=9,500 Btu/lb) produces 105 MW and have a Carnot cycle efficiency of 36%. What is the required coal consumption per hour? a) 47.5 b) 50.0

c) 45.0 d) 42.5

b) 20 c) 27 d) 30 113. A copper smelter plant discharges 12000 m3/hr of seawater at a net head of 20 meters. What will be the potential power in KW to be generated by a mini-hydro assuming generator efficiency is 80%?

GEOTHERMAL POWER PLANT 111. At a geothermal plant, 1500 kgs/second of condensate water at 1.5 MPa is “flashed” in a Flash Tank to produce 107.84 kgs/sec of steam at a pressure of 0.7 MPa. If the specific steam consumption of the Turbine generator is 2.3 kg/s/MW, what will be the power output in MW? A. 46.9 B. 42.2 C. 51.6 D. 37.5 HYDROELECTRIC POWER PLANTS 112. What is the potential power in MW to be generated by a hydroelectric power plant with a design flow rate Q = 35 cms (cu.m./sec) , Gross head Hg =75 meters, total head losses HL = 5 m and 96% generator efficiency? MW :

a) 23

a) 523 b) 473 c) 553 d) 503 114. A copper smelter plant discharges 12000 m3/hr of seawater at a net head of 20 meters. What will be the required in KVA of the generator of the mini-hydro if generator efficiency is 80% and generator power factor is 85%? a) 615 b) 575 c) 555 d) 585 115. What is the potential power in KW to be generated by a run-ofriver mini-hydro using a design flow rate of Q = 15 cu.m./s and net head Hn =15 meters, if overall efficiency is 85%? KW a) 1876 b) 2666 c) 1426 d) 2455 116. A mini-hydro is proposed to utilize excess water of the Binga Dam during the wet season. Determine the design

capacity in MW to be installed if designed for a hydro spillage flow rate of Q = 30 cu.m./s and net head Hn =80 meters, if overall efficiency is 93%.MW a) 22 b) 18 c) 26 d) 30

119. A hydroelectric power plant in Northern Luzon has the following operating data: Flow Q = 110 m3/sec Gross Head = 155 m Total Head Loss = 13 m Overall Efficiency = 90% What will be the Total Generated Power? MW a) 138 b) 128 c) 118 d) 148

117. A hydro-electric plant produces 21.9 MW of power using a flow of 30 m3/s and a head of 80 m. Using Empirical formulas such as PJ Biers formula below, What is the penstock diameter in meters and velocity of flow in m/sec? Given Data : PJ Briers formula, D = 0.176 (P/H)0.466 P = 21.9 MW = 21,900 KW H = 80 m a) 2.4 m, 6.64 b) 2.2 m, 7.04 c) 2.4 m, 7.04 d) 2.2 m, 6.64 118. A hydroelectric power plant has a 37 MW turbine-generator with a power factor of 0.85, frequency of 60 Hz runs at a nominal speed of 327 RPM. What is the number of poles for the generator? Poles a) 22 b) 20 c) 24 d) 18

120. A run-of-river hydroelectric power plant is to be installed based on the following design parameters: Design Data : Flow Q = 48 m3/s Density, p = 1000 kgs/m3 Grav. Acceleration g = 9.81 m/sec2 Gross head, Hg = 35 m Total Head loss, HL = 2.5 m Overall Efficiency Eff = 94% What will be the power output of the generator? MW a) 14.4 b) 24.4 c) 17.7 d) 21.0

121. A run-of-river hydroelectric power plant is to be installed based on the following design parameters: Design Data : Flow Q = 48 m3/s Density, p = 1000 kgs/m3 Grav. Acceleration g = 9.81 m/sec2 Gross head, Hg = 35 m Total Head loss, HL = 2.5 m Overall Efficiency Eff = 94% Generator Power Factor, PF=0.85 What will be the required MVA of the generator? MVA a) 17 b) 20 c) 25 d) 15 122. A mini-hydroelectric plant in Luzon has a flow rate of 5 m3/sec. Convert into GPM a. 79,250 b. 85,600 c. 75,750 d. 65,000 123. A radiator type cross-flow cooling system has a capacity of 160 KW and an area of 140 sq.m. and a cross-flow configuration factor F of 0.95, LMTD of 18 deg C. What is the overall heat transfer coefficient, U in watts/sq.m.K? a) 4.13 b) 3.93 c) 3.73 d) 3.53

124. A radiator type cross-flow cooling system using cupro-nickel tubes has an area of 130 sq.m. , a cross-flow configuration factor F of 0.95, LMTD of 290 deg K and an overall heat transfer coefficient U = 7 watts/sq.m-deg K. What is the heat exchanger capacity in KW.? a) 250 b) 275 c) 225 d) 200 DIESEL-GENERATORS 125. A 5000 KW diesel-generator has a specific fuel oil consumption (SFOC) of 0.22 kg BFO/kw-hr and a specific gravity of 0.96 at 30 deg C. BFO consumption is 1100 kgs/hr (HHVf = 18674 btu/lb). The following are the design parameters for the DG 2ry Cooling system: 1. Heat loss to secondary cooling system- 10% of fuel heat to engine cooling system 2. Heat input to engine (1100 kgs x 2.205 x 18674) = 45,293,787 btu/hr 3. Temperature rise of water thru 2ry cooling system = 5 deg C or 9 deg F What is the volume of water running through secondary cooling system? M3/hr A. 228 B. 205 C. 250

D. 182 126. A 4-cycle V-type 18-cylinder turbo-charged diesel-generator with a rated PS of 7090 and a generator output of 5000 KW runs at 720 rpm. If the whole DG set weighs 53 MT and foundation weight is 156.4 MT, What is the minimum required foundation HEIGHT? m, assuming the following are given: D-G weight, We= 53 MT Foundation weight Wf= 156.4 MT Density of concrete = 2.4 MT/m3 Foundation length, L = 9000 mm Foundation width, W= 3190 mm A. B. C. D.

2.27 3.84 3.08 4.61

D. 33.91 128. A 5000 KW diesel-generator has a specific fuel oil consumption (SFOC) of 0.22 kg BFO/kw-hr and a specific gravity of 0.96 at 30 oC. BFO consumption is 1100 kgs/hr (HHVf = 18674 Btu/lb). The following are the design parameters for the DG: 1. Heat loss to radiator (jacket cooling system) =11% of fuel heat to engine 2. Heat input to engine (1100 kgs x 2.205 x 18674) = 45,293,787 Btu/hr 3. Cooling water temperature entering radiator, Ti = 90 deg C 4. Cooling water temperature leaving radiator, To = 75 deg C What is the volume of water running through Radiator? M3/hr A. 84 B. 75 C. 92 D. 100 129. A land-based oil rig has a diesel engine using diesel with a heating value of 20,000 Btu/lb consumes 292 lbm/hr of fuel. What is the heat input to the engine in horsepower? hp

127. A 5000 KW diesel-generator has a specific fuel oil consumption (SFOC) of 0.22 kg BFO/kw-hr and a specific gravity of 0.96 at 30 deg C. BFO consumption is 1100 kgs/hr (HHVf = 18674 btu/lb). What is the overall thermal efficiency of the Diesel Generator? % A. 37.68 B. 36.17 C. 39.25

a) 2,295 b) 2,400 c) 2,500 d) 2,200 130. A land-based oil rig has a diesel engine using diesel with a heating value of 20,000 Btu/lb consumes 292 lbm/hr of fuel. What is

the engine output in horsepower (hp) if overall engine efficiency is 35%? a) 800 b) 900 c) 700 d) 600

131. A land-based oil rig has a diesel engine using diesel with a heating value of 20,000 btu/lb produces 803 hp output. What is the fuel consumption in lbs/hr if overall engine efficiency is 35%. lbs/hr? a) 292 b) 250 c) 350 d) 192 132. A diesel-generator is required as emergency power for an office building at the Cebu Business Park. A Mitsubishi S16R-PTA-S unit rated at 1,550 KW is proposed. What is the fuel consumption in (li/hr) if heating value of diesel is 37,400 Btu/li and overall engine efficiency is 35%? a) 404 b) 354 c) 325 d) 304 133. A diesel-generator is required as emergency power for an office building at the Cebu Business Park. A Mitsubishi S16R-PTA-S unit

rated at 1,550 KW power with a guaranteed specific fuel consumption of 0.26 li/KW-hr is chosen. What is the fuel consumption in liters/hr at full load.? a) 403 b) 353 c) 323 d) 303 134. A diesel-generator is required as emergency power for an office building at the Cebu Business Park. A Mitsubishi S16R-PTA-S unit rated at 1,550 KW power with a guaranteed specific fuel consumption of 0.26 li/KW-hr is chosen. What is the required fuel heating value of the fuel if overall efficiency is 35%? Btu/li a) 37,500 b) 40,000 c) 35,000 d) 32,500 135. A diesel engine runs at 1,700 RPM and output torque is 2500 ftlbs. The average engine efficiency is 35% is using diesel fuel with a heating value of 20,000 btu/lb. What is the power output in horsepower? (hp). a) 809 b) 759 c) 709 d) 859

136. A diesel engine runs at 1,750 RPM and output torque is 1250 ftlbs. Diesel fuel with a heating value of 20,000 Btu/lb is used as fuel. What is the power output in horsepower (hp)? a) 416 b) 376 c) 346 d) 316 137. A diesel engine runs at 1,750 RPM and output torque is 1250 ftlbs. Engine efficiency is 32% and diesel fuel with a heating value of 20,000 Btu/lb is used as fuel. What is the nearest input power in horsepower (hp)? a) 1300 b) 1400 c) 1200 d) 1100 138. A standby DG set (Cummins Model 60 DSFAD) is to be installed at the DOLE-Cordillera Administrative Region office in Baguio City. Weight of engine, We = 1140 kgs, rated at 60 KW and speed of 1800 RPM. Using the formula Wf = We x e x √N, determine the minimum weight of the foundation, Kgs? a) 5,320 b) 4,320 c) 3,320 d) 6,320 139. A standby DG set (Cummins Model 60 DSFAD) is to be installed at the DOLE-Cordillera Administrative Region office in Baguio City. Weight of engine, We = 1140 kgs, rated at 60 KW and speed of 1800

RPM. Engine foundation has 1100mmW x 2200mmL and weighs 5,320 kgs. What is the depth of the foundation. M? a) 0.92 b) 0.82 c) 0.72 d) 1.02 140. What is the capacity of a diesel-generator to be installed in a commercial building in Tacloban City to provide power after Typhoon Yolanda. Total aircon load is 113 TOR and other electrical loads was computed at 82 KW. What is the minimum DG capacity, KW if DG is run at 80% load? kw a) 600 b) 550 c) 500 d) 450 141. A commercial building in Tacloban City has installed a Caterpillar D/G Model C18 with a capacity of 600 KW has a fuel consumption of 144.6 lph at 600 kw load. If the DG is utilized at an average of 80% load for 300 hrs/month, What is the fuel consumption per month? Li/mo a) 34,700 b) 35,700 c) 36,700 d) 33,700 142. A commercial building in Tacloban City has installed a Caterpillar D/G Model C18 with a capacity of 600 KW and N=1800 RPM. Weight

of DG, We = 3732 kg. What is the height of the foundation if L=4m, W=1.5 m.? m a) 1.2 b) 1.0 c) 1.4 d) 0.8 143. A commercial building in Tacloban City has installed a Caterpillar D/G Model C18 with a capacity of 600 KW and N=1800 RPM. Weight of DG, We = 3732 kg. What is the weight of the foundation? kg a) 17,417 b) 15,417 c) 13,417 d) 19,417 144. A commercial building in Tacloban City has installed a Caterpillar D/G Model C18 with a capacity of 600 KW and N=1800 RPM. Weight of DG, We = 3732 kg. What is the volume of the foundation? M3 a) 7.3 b) 6.3 c) 5.3 d) 8.3 145.What is the weight of a foundation for a standby DG kgs (1800 RPM, Weight, We = 900 kgs, e= 0.11) of a gas station? Using the formula, WF = We x e x √N a) 4,200 b) 4,500 c) 4,800

d) 3,900

146. What is the soil bearing stress (kgs/m3) for the foundation of a standby DG (Weight, We = 900 kgs,) of a gas station if the area and weight of the concrete foundation is 1.1 m2 and 4.2 M?

a) 4,636 b) 5,636 c) 3,636 d) 6,636 147. A diesel power plant in Zamboanga City uses 4 units of 10.7 MW Stork-Wartsila 18V38 DGs. Engine weight, We is 129.5 mt and speed is 600 rpm. What is the minimum foundation weight using empirical factor, e = 0.11 for this particular engine? mt a) 349 b) 325 c) 300 d) 275 148. A diesel power plant in Zamboanga City uses 4 units of 10.7 MW Stork-Wartsila 18V38 DGs. Engine weight, We is 129.5 mt and speed is 600 rpm. What is the minimum foundation volume using empirical factor, e = 0.11 for this particular engine and concrete density of 2.4 mt/m3. a) 145.4 b) 125.4

c) 165.4 d) 185.4 149. A diesel power plant in Zamboanga City uses 4 units of 10.7 MW Stork-Wartsila 18V38 DGs. Engine weight, We is 129.5 mt and speed is 600 rpm. What is the minimum foundation depth in meter? Use empirical factor, e = 0.11 for this particular engine, length of foundation, Ldgf= 12.2m and width of foundation, Wdgf= 3.8m. Use concrete density of 2.4 mt/m3.? :

a) 3.14 b) 3.34 c) 3.54 d) 3.74

150. A diesel power plant in Zamboanga City uses 4 units of 10 MW Stork-Wartsila 18V38 DGs. Fuel consumption at 100% load is 0.2045 kg/kwhr using bunker C with specific gravity of 0.98. What is the required HFO storage tank capacity in cu.m. (m3) for 2 month supply at 90% operating load assuming 24 x 7 operation.? M3 a) 10,818 b) 10,418 c) 10,618 d) 10,218 151. A diesel power plant in Zamboanga City uses 4 units of 10 MW Stork-Wartsila 18V38 DGs. Lube oil consumption at is 0.8 g/kwhr. What is the required Lube storage tank capacity in MT for 2 month supply at 90% operating load assuming 24 x 7 operation? a) 41.5 b) 36.5 c) 31.5

d) 46.5 152. A diesel power plant in Zamboanga City uses 4 units of 10 MW Stork-Wartsila 18V38 DGs. Bunker fuel consumption (HHV= 41,000 btu/kg) at is 0.2054 kg/kwhr. What is the thermal efficiency of the diesel generators? %. a) 40.5 b) 38.5 c) 36.5 d) 34.5 153. A 40 MW diesel power plant in Zamboanga City has a bunker C transfer pump rated at 39 m3/hr (650 lpm) at TDH of 124 m. Bunker C specific gravity is 0.98. What is the motor load if pump efficiency is 72% and motor efficiency is 90%? kw a) 20 b) 22 c) 18 d) 16 155. The cooling system for a Wartsila 18V38 diesel engine has a flow rate of 246.4 m3/hr entering the engine at 76 deg C and leaving to be cooled in a heat exchanger at 93 deg C. What is the heat load of the jacket cooling water?, KW. a) 4872 b) 3872 c) 5372 d) 4372

156. A heat exchanger is used to cool a diesel generator’s cooling system. Water from the cooling tower enters the heat exchanger at 43 deg C and leaves at 60 deg C. If heat load from the engine is 4,872 KW, What is the required water flow, cu.m./hr, through the heat exchanger? M3/hr a) 246.4 b) 226.4 c) 206.4 d) 266.4 157. The cooling tower pump for a Wartsila 18V38 diesel engine has a flow rate of 250 m3/hr and 50 m head and has 75% pump efficiency and 90% motor efficiency. What is the motor load? KW a) 50.5 b) 45.5 c) 40.5 d) 55.5 158. A 10 MW DG uses 1,985 kgs/hr of bunker fuel (LHV=38,200 btu/kg) when generating at 9 MW load. What is the thermal efficiency of the DG? %. a) 40.5 b) 38.5 c) 36.5 d) 34.5

159. A steam line is used to carry 64.6 mtph of 40 barg, saturated steam with a specific volume of 0.05 cu.m./kg. What is the pipe diameter required if velocity is limited to 3000 m/min? a) 6” b) 5” c) 4” d) 8” 160. A pump for an Orival side stream filter for a Diesel PP in Mobo, Masbate has a capacity of 2.5 m3/min at a TDH of 11 meters. What is the water horsepower? KW. a) 4.5 b) 5.0 c) 4.0 d) 5.5

161. A pump for an Orival side stream filter for a Diesel PP in Mobo, Masbate has a capacity of 2.5 m3/min at a TDH of 11 meters. What is the brake horsepower, in KW, if pump efficiency is 70%? a) 6.4 b) 7.0 c) 6.9 d) 5.9 162. A booster pump for an Orival side stream filter for a Diesel PP in Masbate has a capacity of 2.5 m3/min at a TDH of 11 meters. What is

the motor load in KW if pump efficiency is 70% and electrical efficiency is 90%?

d) 15,000

a) 7.1 b) 6.6 c) 7.6 d) 6.1 BIOMASS PLANT 163. A 12 MW Biomass Power Plant in San Jose City, Nueva Ecija uses 14 mtph of rice husks as their primary fuel. Boiler capacity is 52,500 kgs/hr at 52 bars and 485oC. Feedwater enters the boiler with an enthalphy of 546.3 KJ/kg and leaves the boiler with steam enthalpy of 3,388 KJ/kg. If 14 mtph of rice husks is used at 80% boiler efficiency, what is the gross heating value of the rice husk fuel burned? KJ/kg a) 10,656 b) 10,156 c) 9,656 d) 9,156 164. A 12 MW Biomass Power Plant in San Jose City, Nueva Ecija uses rice husks as their primary fuel (GCV = 10,656 KJ/kg). Boiler capacity is 52,500 kgs/hr at 52 bars and 485 deg C. Feedwater enters the boiler with an enthalphy of 546.3 KJ/kg and leaves the boiler with steam enthalpy of 3,388 KJ/kg. What is the rice husk fuel required per hour? Kgs/hr a) 14,000 b) 13,000 c) 12,000

165. A 12 MW Biomass Power Plant in San Jose City, Nueva Ecija has a Boiler capacity of 52,500 kgs/hr. What is the boiler feedwater pump capacity, m3/hr, assuming the following design data? 1. Feed water SG = 0.93 at 135 deg C 2. Blow down = 1050 kgs/hr 3. Feed water flow at 110% of MCR 4. Capacity flow allowance – 5% a) 66.5 b) 71.5 c) 61.5 d) 56.5 166. Exhaust steam from a steam turbine (41.8 mtph at 0.1 bar abs, 45.8 deg C, hes = 2373 KJ/kg) goes to a steam condenser. Condensate produced has an enthalpy of 192 KJ/kg. What is the required cooling water flow, m3/hr, if it enters at 32 deg C and leaves at 40 deg C? a) 2,726 b) 2,526 c) 2,326 d) 2,926 167. A cooling tower for a 12 MW Biomass power plant has a cooling capacity of 3,750 m3/hr. Water entering at 41 deg C and leaving the

cooling water at 33 deg C. Wet bulb temperature is 28 deg C. What is the cooling tower effectiveness? %

% S = nil What is the approximate Gross heating value, BTU/Lb, using Dulong’s formula?

a) 61.5 b) 66.5 c) 71.5 d) 76.5 168. A cooling tower for a 12 MW Biomass power plant has a cooling capacity of 3,750 m3/hr. Water entering at 41 deg C and leaving the cooling water at 33 deg C. Wet bulb temperature is 28 deg C. What is the cooling tower range, deg C?

a) 5,392 b) 4,892 c) 4,392 d) 5,892 171. A biomass boiler produces saturated steam at 16 mtph, 17 kg/cm2g (enthalpy at 2796 KJ/kg). Boiler feedwater enters at 272 KJ/kg enthalpy. What is the boiler thermal efficiency, %, if fuel used is 4,275 kgs of rice hulls (HV = 12,350 KJ/kg).?

Solution: Range = 41 – 33 = 8 deg C a) 8 b) 9 c) 5 d) 13 169. A cooling tower for a 12 MW Biomass power plant has a cooling capacity of 3,750 m3/hr. Water entering at 41 deg C and leaving the cooling water at 33 deg C. Wet bulb temperature is 28 deg C. What is the cooling tower approach, deg C? a) 5 b) 8 c) 13 d) 6 170. A 12 MW Biomass power plant uses rice husk as fuel. Ultimate analysis of this fuel shows the following (bone dry basis): % C = 36.4% % H = 4.6% % O2 = 35.8%

a) 76.5 b) 80.5 c) 78.5 d) 74.5 172. A turbo blower with a rating of 2500 CFM, 7 inch WG and fan efficiency of 60% is used to provide auxiliary combustion air to a biomass boiler. What is the nearest fan motor drive rating? HP a) 5 b) 7.5 c) 10 d) 3 FUELS & COMBUSTION 173. Using Dulong’s Formula (Hv =33820C + 144212(H-O/8) + 9304S), What is the heating value of coal in kJ/Kg, with the following specification?

Coal analysis: Carbon, C – 52% Hydrogen, H – 5.2% Ash - 15.5% Sulfur, S – 1.0% Oxygen O- assume balance (100-73.7 = 26.3%O 2) a) 20,437 b) 21,037 c) 22,037 d) 19,437

174. Using Dulong’s Formula (Hv =33820C + 144212(H-O/8) + 9304S kJ/kg), What is the heating value of coal in kJ/Kg, with following specification? Coal analysis: Carbon, C – 53% Hydrogen, H – 6% Ash - 14.5% Sulfur, S – 1.5% Oxygen O- 25% a) 22,200 b) 20,000 c) 18,200 d) 24,200 175. Using Dulong’s Formula (Hv =33820C + 144212(H-O/8) + 9304S kJ/kg), What is the heating value of coal, in kJ/Kg,with following specification?

Coal analysis: Carbon, C – 54% Hydrogen, H – 4.5% Ash - 15.5% Sulfur, S – 2.0% Oxygen O- % by balance (24%) a) 20,612 b) 22,612 c) 18,612 d) 16,612 176. In fuel combustion, theoretical Air-Fuel ratio can be computed by the formula Ma/Mf = 11.5C+34.5(H-O/8)+4.3S to determine the weight of air per unit weight of fuel. What is the air-fuel of Indonesian coal with 52% carbon, 6% hydrogen, 15.5% Ash, 1% sulfur and 25.5% oxygen providing for 20% excess air? kg air/kg fuel a) 8.4 b) 9.4 c) 7.4 d) 10.4 177. In fuel combustion, the theoretical Air-Fuel ratio can be computed by the formula Ma/Mf = 11.5C+34.5(H-O/8)+4.3S to determine the weight of air per unit weight of fuel. What is the theoretical air-fuel ratio for low-quality coal with 42% carbon, 5% hydrogen, 20.5% Ash, 3.5% sulfur and 29% oxygen? Kg air/kg fuel? a) 5.3 b) 6.3 c) 7.3 d) 8.3

182. What is the lower heating value (LHV) in Btu/lb of bunker fuel with an HHV of 18,400 btu/lb and 11.5% hydrogen content? 178. In fuel combustion, the theoretical Air-Fuel ratio can be computed by the formula Ma/Mf = 11.5C+34.5(H-O/8)+4.3S to determine the weight of air per unit weight of fuel. What is the practical air-fuel ratio for low-quality coal with 42% carbon, 5% hydrogen, 20.5% Ash, 3.5% sulfur and 29% oxygen allowing for 25% excess air? kg air/kg fuel

a) 18,279 b) 19,279 c) 17,279 d) 16,279 183. What is the estimated % of hydrogen content of bunker fuel with a specific gravity (SG) of 0.97? %

a) 6.4 b) 7.4 c) 8.4 d) 9.4 179. In fuel combustion, theoretical Air-Fuel ratio can be computed by the formula Ma/Mf = 11.5C+34.5(H-O/8)+4.3S to determine the weight of air per unit weight of fuel. What is the air-fuel of Indonesian coal with 52% carbon, 6% hydrogen, 15.5% Ash, 1% sulfur and 25.5% oxygen providing for 20% excess air? a) 8.4 b) 9.4 c) 8.9 d) 7.9 181. A certain grade of bunker fuel has a HHV of 38,720 btu/li. What is its equivalent HHV in KCal/li? a) 9,757 b) 18,400 c) 8,757 d) 10,757

a) 11.45 b) 10.45 c) 12.45 d) 13.45

184. A coal-fueled burner in a fertilizer plant in Cebu requires 26 mt/hr of combustion air injected by a FDF (forced draft fan) at 30 deg C atm at a density of 1.17 kg/m3 of air. What is the required FDF capacity in CFM assuming 20% allowance in capacity? a) 15,700 b) 17,500 c) 13,000 d) 11,000 185. A wood-fired furnace for a Village-scale bio-ethanol distiller, uses 63.6 kg/hr of wood with a HHV of 12000 kJ/kg. If the Air-fuel ratio for the furnace is 8.0 and air density is 0.075 lbs/ft3. What is the combustion air requirement, in CFM (cubic feet per minute)?

a. 250 b. 300 c. 200 d. 350 186. Using the ASME formula, what is the approximate HHV of bunker fuel with 15 deg API? Btu/lb a) 18,580 b) 18,080 c) 19,080 d) 17,680 187. What is the lower heating value of fuel, LHV in Btu/lb, for a bunker fuel oil with an HHV of 18,580 btu/lb and 11.5% H2 ? a) 18,459 b) 17,959 c) 17,459 d) 16,959 188. The steam condenser at a copper smelter with a capacity of 45 mtph of steam at enthalpy of 2374 KJ/k and condensate with temperature of 37 deg C and 155 KJ/kg. What is the cooling water in cu.m./hr for the condenser for a temperature rise of 5 deg C? m3/hr a) 4,770 b) 5,770 c) 3,770 d) 6,770

189. A steam condenser with a capacity of 45 mtph of steam at enthalpy of 2374 KJ/k and condensate with temperature of 37 deg C and 155 KJ/kg. What is the heat load in KW? a) 27,738 b) 26,738 c) 25,738 d) 28,738 INDUSTRIAL PLANT DESIGN ELECTROSTATIC PRECIPITATORS (ESP) 323. What is the inlet dust in g/Nm3 of an electrostatic precipitator that has an overall collection efficiency of 99.51% if the outlet dust is 500mg/Nm3? a) 102 b) C. 98 c) 94 d) D. 90 324. What is the outlet dust in g/Nm3 of an electrostatic precipitator that has an overall collection efficiency of 99.51% if the inlet dust is 102 g/Nm3? a) 0.5 b) C. 0.4 c) 0.7 d) D. 1.0

325. What is the overall % dust removal efficiency of an electrostatic precipitator that has dust inlet of 102 g/Nm3 and an outlet dust of 0.5 g/Nm3? a) 99.5% b) C. 98.5% c) 97.5% d) D. 96.5% 326. A 2-field (2 chambers in series) Electrostatic Precipitator has a collection efficiency of 94% per chamber. What would be the overall collection efficiency if all fields are operating normally? A. 99.64% B. C. 98.0% C. 97.5% D. D. 96.9% 327. A 2-field (2 chambers in series) Electrostatic Precipitator has a collection efficiency of 94% per chamber. If one of the chambers is downed due to operational problems, what would be the expected collection efficiency of the electrostatic precipitator in %? A. 94.0 B 93.0 C.95.0 D. 94.5

328. A 2-field (2 chambers in series) electrostatic precipitator is designed for a collection efficiency of 90.0% per chamber. What would be the outlet dust if 2000 ppm of dust is introduced at inlet in ppm?

A. 20 B. 10 C. 30 D. 40 329. A 2-field (2 chambers in series) electrostatic precipitator is designed for an overall collection efficiency of 99.0%. What would be the collection efficiency if one of the chambers is down (zero voltage in %)? A. 90 B. 94 C. 92 D. 96

330. To clean the flue gas at a coal-fired power plant in Iloilo, an Alstom electrostatic precipitator with 4 fields and a gas flow of 300,000 Nm3/hr is designed to clean the flue gas containing 30 g/Nm3 at inlet to 100 mg/Nm3 at outlet. What is the ESP dust removal efficiency in %? A. B. C. D.

99.67 99.50 99.25 99.17

331. A Flakt ESP (electrostatic precipitator) with 3-fields has a capacity of 36,000 Nm3/hr. Dust inlet is at 80 g/Nm3 and outlet at 1 g/Nm3. What is the overall dust removal efficiency of the ESP .in %% a. 98.75

b. 99.25 c. 99.00 d. 98.50 332. A 2-field ESP has a collection efficiency of 96% per chamber. If dust outlet is 0.5 g/Nm3, what was the dust inlet in g/Nm3? a. 312.5 b. 110.6 c. 215.6 d. 255.6

D. 97.0 335. The bag filter of a steam dryer at a copper smelter captures 99.5% of dust that enters. If the inlet dust load is 60 g/Nm3 and total dust entering is 1 MT/Hr, what will be the dust load at the outlet in g/Nm3 and Kgs/hr? a. b c. d.

0.3 g/Nm3 and 5 kgs/hr 0.5 g/Nm3 and 3 kgs/hr 0.3 g/Nm3 and 10 kgs/hr 0.5 g/Nm3 and 5 kgs/hr

BAG FILTERS 333. A bag filter is used to recover copper concentrates from Steam Dryer exhaust. If the copper concentrate dust entering the bag filter is 2.4 metric tons per hour and collection efficiency is 98.5%, what is the dust released to the atmosphere, kg/hr? A. 36 B. 40 C. 30 D. 24 334. A bag filter is used to recover copper concentrates from Steam Dryer exhaust. If the copper concentrate dust entering the bag filter is 2.4 metric tons per hour and dust discharge to the atmosphere is 36 kgs/hr, what is the collection efficiency of the bag filter in %? A. 98.5 B. 99.0 C. 97.5

CYCLONES 336. In a wood pulping plant in Mindanao, a long-cone helical roof cyclone separator is used to separate wood chips from wood fines. The wood chips go to a Pulping Plant while the fines go to the woodfired boiler as fuel. If 26 mt/hr of material is injected into the cyclone and its average efficiency is 85%, how much material would go to the Pulping Plant, mt/hr? A. 22.1 B. 24.1

C. 33.9 D. 20.1 337. A cyclone is designed to separate plastic balls from the motive air. If each ball weighs 0.01 lbs and required transport capacity is 1 mt per 24 hours, how many plastic balls are transported per hour? a. 9,187 b. 13,530 c. 15,010 d. 11,020 CONVEYING SYSTEM (PNEUMATIC, BELT) 338. In an limestone crushing plant, a belt conveyor has an incline of 15 degrees. If the horizontal center-to-center distance of the head and tail pulleys is 100 m, what is the length of the conveyor measured from center-to-center distance of the pulleys? m A. 103.53 B. 105.50 C. 96.59 D. 102.50 339. A 20 hp motor is used to drive a belt conveyor. Convert 20 Hp to ft-lbs/sec a. 11,000 b.. 66,000 c. 50,900 d. 74,600

PUMPS 340. The Sewer System of a 4-star hotel is designed for a maximum flow rate of 1.0 cu.m. per minute. What is the expected pump motor load, in horsepower (HP) if required TDH is 5 meters, Sp. Gr. Is 1.05, pump efficiency is 80% and electrical efficiency. 3.0? A.. 1.0 B. 4.0 C. 6.0 D. 1.5 341. Specify the Water Storage tank capacity (Cu. Meters)) for a 1200 gpm fire pump to be used for Fuel tank farm Fire protection system if the requirement is 2 hours supply. Cu m. a. 545 b. 445 c. 645 d. 745 342. A fire pump rated at 1200 gpm and 150 ft TDH is used for a fuel tank farm fire protection system. What is the pump motor load if pump efficiency if 76% and motor efficiency is 80% in Hp?

a. 75 b. 65

b. 85 d. 95

343. A hot water pump rated at 5 ft3/min (37.4 gpm) is to be installed for a hotel. Head required is 50 ft and overall efficiency is 60%. What is the motor load of the pump. hp a) 0.8 b) 0.9 c) 0.7 d) 0.6 344. A cooling water pump for a compressor station requires 105 m 3/hr delivery at 38.4 m TDH. What is the pump water horsepower hp?. a) 15 b) 25 c) 20 d) 30 345. A cooling water pump for a compressor station requires 105 cu.m./hr delivery a 38.4 m TDH. What is the pump brake horsepower, bhp if pump efficiency is 75%. Hp? a) 20 b) 15 c) 25 d) 30

346. An GOULDS pump is used to provide 1,100 cu.m./hr of water at a head of 40 meters. What is the pump motor load in KW if pump efficiency is 75% and motor efficiency is 90% in kw? a) 178 b) 218 c) 198 d) 238 347. An EBARA pump is used for transporting 90 cu.m./hr of sulfuric acid (SG = 1.8) at a TDH of 90m. What is the pump motor load in KW if pump efficiency is 78% and motor efficiency is 95%. KW? a) 54 b) 74 c) 64 d) 84 348. An deepwell pump is used for transporting 250 cu.m./hr of water supply for a copper smelting plant in Chile . Total TDH is 15 bars. What is the pump motor load in KW if pump efficiency is 70% and motor efficiency is 90%? a) 162 b) 202 c) 182 d) 222 349. A cooling tower pump is used for pumping 650 cu.m./hr of cooling water for a copper casting plant in Leyte . Total TDH is 20 m. What is the pump motor load in KW if pump efficiency is 75% and motor efficiency is 90%. KW

a) 53 b) 73 c) 63 d) 83

350. A cooling tower pump is used for pumping 2,860 gpm of cooling water for a copper casting plant in Leyte . Total TDH is 66 ft. What is the pump motor load in HP if pump efficiency is 75% and motor efficiency is 90%? a) 70 b) 90 c) 80 d) 100 351. A pump is used to recycle wastewater for an industrial plant is required a discharge volume of 200 gpm at a TDH of 85 ft. What is the motor load in HP, if pump efficiency is 80% and motor efficiency is 90%? a) 6 b) 8 c) 7 d) 9 352. A fire pump for a fuel tank farm is required a discharge volume of 3250 lpm at 126m head. What is the motor load, KW, if pump efficiency is 75% and motor efficiency is 90%? a) 99 b) 89

c) 109 d) 79 353. A fire pump for a fuel tank farm is required a discharge volume of 860 gpm at a TDH of 413 ft. What is the motor load, HP, if pump efficiency is 75% and motor efficiency is 90%? a) 133 b) 123 c) 143 d) 113 354. A pump used to recycle wastewater for an industrial plant requires a discharge volume of 200 gpm at a TDH of 85 ft. What is the motor load, HP, if pump efficiency is 80% and motor efficiency is 90%? a) 6 b) 8 c) 7 d) 9

355. An iron ore sintering plant in Misamis Oriental with a capacity of 3,600 m3/hr and a total head of 14.5 m is driven 8-pole motor (900 rpm). What is the motor load, KW if pump efficiency is 76% and motor efficiency is 90%? a) 208 b) 218 c) 198 d) 188

356. A deepwell pump with a capacity of 900 gpm is to be installed 420 feet deep in the Atacama desert of Chile. Water will be stored into an elevated tank 65 ft above ground and other head losses total 50 ft. What is the pump water horsepower hp?

359. A fire pump rated at 415 gpm, 135 psi with overall efficiency of 62% is to be installed at the DOLE-Cordillera Administrative Region office in Baguio City. Determine the motor load of the pump. a) 40 b) 30 c) 35 d) 25

a) 122 b) 142 c) 132 d) 112 357. A deepwell pump with a capacity of 900 gpm is to be installed 420 feet deep in the Atacama desert of Chile. Water will be stored into an elevated tank 65 ft above ground and other head losses total 50 ft. What is the motor load in HP if pump efficiency is 70% and motor efficiency is 90%? a) 193 b) 183 c) 203 d) 173 358. A deepwell pump with a capacity of 3.4 cu.m./min is to be installed 128 m deep in the Atacama desert of Chile. Water will be stored into an elevated tank 19.8 above ground and other head losses total 15.2 m. What is the pump brake KW if pump efficiency is 70%. a) 129.4 b) 119.4 c) 139.4 d) 109.4

360. A gas station has a diesel dispensing pump with a capacity of 45 lpm (0.00075 cu.m./sec) and TDH of 15m. What is the theoretical KW if diesel fuel SG = 0.832. a) 0.092 b) 0.192 c) 0.142 d) 0.242 361. A gas station has a diesel dispensing pump with a capacity of 45 lpm (0.00075 cu.m./sec) and TDH of 15m. What is the Motor load if diesel specific gravity SG =0.832, pump efficiency= 60%, motor efficiency=90%? :

a) 0.17 b) 0.21 c) 0.19 d) 0.23

362. A deepwell pump is to be installed in the Atacama desert of Chile. Test showed that the static water level is 26m below ground level and

drawdown is 1.2m. Standard 3m allowance will be used. How deep should the deepwell pump be installed from ground level in meter? a) 30.2 c) 23.0 b) 24.2 d) 29.0

THERMODYNAMICS/HEAT CALCULATIONS 363. In a copper smelter Flash Furnace, the water-cooled Uptake (portion that cools the furnace gases) has the following design data: a. Gas Flow - 44,000 Nm3/hr b. Temp of water entering - 55 deg C c. Temp of water leaving - 65 deg C c. Cooling water flow - 250 m3/hr What is the heat absorbed by the water in Btu/hr?. A. 9,922,500 B. C. 10,915,000 C. 8,930,000 D. 7,938,000

364. A plate-type Heat exchanger is used to recover heat from 45 MTPH of condensate at 100 deg C to heat process water from 40 deg C to 52 deg C. Outlet temperature of condensate is 50 deg C. What is the available heat from the condensate in Btu/hr?

A. 8,930,000 C. 9,820,000 B. 7,144,000 D. 6,250,000 365. A hotel proposes to recover condensate from its laundry facility. Its fire tube boiler for the laundry produces steam at 1,700 kgs per hour. What is the heat in Kilowatts (KW) that can be recovered if condensate is fully recovered. Given data: Temperature of condensate – 97 deg C Temperature of water - 22 deg C a) 148.3 b) 138.3 c) 158.3 d) 128.3 366. A hotel proposes to recover condensate from its laundry facility. Its fire tube boiler for the laundry operates for 10 hours a day at 1,700 kgs per hour. What is the potential diesel fuel that can be saved per 30-day month if condensate is fully recovered in liters/month. Given data: Temperature of condensate – 97 deg C Temperature of water - 22 deg C Boiler efficiency - 80% Gross heating value of fuel – 38,600 kJ/liter a) 5,186 c) 7,168 b) 6,186 d) 8,168

367. A hot water diesel-fired boiler for a hotel operates at 75% efficiency is used to heat 2,749 gal/day of water from 30 deg C to 65 deg C. What is the diesel fuel consumption if HHV of diesel fuel is 36,700 BTU/liter?. Li/day a) 52.4 b) 62.4 c) 72.4 d) 82.4 368. A hot water diesel-fired boiler for a hotel operates at 75% efficiency is used to heat 2,749 gal/day of water from 30 deg C to 65 deg C. What is the cost per year (365 days) if HHV of diesel fuel is 36,700 BTU/liter and cost per liter is P30? a) P573,780 c) P473,780 b) P673,780 d) P773,780 369. In an Abaca Pulp Mill in Albay, a digester (cooking vessel) made of steel (Cp = 0.5 kJ/kg-C)is to be preheated from 30 deg C to 162 deg C using steam of 6.5 barg saturated (Latent heat of vaporization of 2,288 kJ/Kg). What is the theoretical quantity of steam required to preheat the digester vessel.? Disregard heat losses. Only latent heat of vaporization will be utilized in kg? a) 620 b) 520 c) 720

d) 820 370. In an Abaca Pulp Mill in Albay, pulp is cooked. Total weight is 46.1 MT (digester vessel + pulp raw materials) with an average Cp = 1.354 kJ/kg-C is to be heated from 30 deg C to 162 deg C using steam of 6.5 barg saturated (Latent heat of vaporization of 2,288 kJ/Kg). What is the theoretical quantity of steam required to heat the system to its final temperature. Disregard heat losses. Only latent heat of vaporization will be utilized in Kg? a) 3600 c) 3900 b) 4600 d) 3300 371. An abaca pulp steam dryer is used to dry 1100 kg/hr of wet abaca pulp containing 55% water to 550 kg/hr final product with 10% water. The steam used for drying is 4 bars, 2738 kJ/kg enthalpy and 605 kJ/kg as condensate. The evaporated water from the wet pulp leaves the dryer at 0 bar, 100 deg C at 2257 kJ/kg heat of vaporization. Raw material goes in at 100 deg C and leaves as product at 100 deg C. Neglecting heat losses, What is the steam consumption per hour in kgs/hr? a) 582 c) 782 b) 682 d) 482

372. An abaca pulp steam dryer is used to dry 500 kg/hr of wet abaca pulp containing 55% water to 305.6 kg/hr final product with 10% water. The steam used for drying is 3.2 bars, 2728 kJ/kg enthalpy and 571 kJ/kg as condensate. The evaporated water from the wet pulp leaves the dryer at 0 bar, 100 deg C at 2257 kJ/kg heat of vaporization. Raw material goes in at 100 deg C and leaves as product at 100 deg C. Neglecting heat losses, What is the steam consumption per hour in kgs/hr? a) 256 b) 356 c) 156 d) 456 373. Condensate from process, 15 mt/hr at 7 barg, 165 deg C, 697 kJ/Kg is to be recovered in a Flash Tank, to generate steam at 2.2 bargs & 2711 kJ/kg enthalphy. The water formed in the flash tank is at 2.2 kgs, 123.3 deg C and 517.6 kJ/kg of heat. What is the steam produced by Flash tank, MT/Hr?. kgs/hr a) 1,100 b) 1,500 c) 1,300 d) 1,900 374. Condensate from process, 15 mt/hr at 7 barg, 165 deg C, 697 kJ/Kg is to be recovered and “flashed” in a Flash Tank, to generate steam at 2.2 bargs & 2711 kJ/kg enthalphy. The water formed in the flash tank is at 2.2 kgs, 123.3 deg C and 517.6 kJ/kg of heat. What is the steam produced by Flash tank, % of Input?

a) 7.36 b) 9.36 c) 8.36 d) 10.36 375. Condensate from a large boiler HP heater system, 55 mt/hr at 40 barg, 250.3 deg C, 1,087 kJ/Kg is to be recovered and “flashed” in a Flash Tank, to generate heating steam at 2.2 bargs & 2711 kJ/kg enthalphy. The water formed in the flash tank is at 2.2 kgs, 123.3 deg C and 517.6 kJ/kg of heat. What is the steam produced by Flash tank, MT/Hr? kgs/hr? a) 14278 b) 15278 c) 13278 d) 12278

376. Condensate from a large boiler HP heater system, 55 mt/hr at 40 barg, 250.3 deg C, 1,087 kJ/Kg is to be recovered and “flashed” in a Flash Tank, to generate heating steam at 2.2 bargs & 2711 kJ/kg enthalphy. The water formed in the flash tank is at 2.2 kgs, 123.3 deg C and 517.6 kJ/kg of heat. What is the steam produced by Flash tank, % of Condensate Input? a) 26 b) 31 c) 21 d) 15 377. Condensate from a process heater system, 30 mt/hr at 34 barg, 241 deg C, 1,042 kJ/Kg is to be recovered and “flashed” in a Flash

Tank, to generate heating steam at 10 bargs & 2776 kJ/kg enthalphy. The water formed in the flash tank is at 180 deg C and 762.6 kJ/kg of heat. What is the steam produced by Flash tank, kg/Hr? a) 4,160 b) 5,160 b) 3,160 d) 2,160 378 The travelling chain grate stoker of a coal-fueled burner has a combustion heat rate (CHR) of 250,000 btu/hr-ft2 uses 2,900 lbs/hr of coal (HHVaf =8,750 btu/lb). What is the minimum area of the grate stoker? ft2 . a) 101.5 b) 91.5 c) 121.5 d) 111.5 379. The travelling chain grate stoker of a coal-fueled burner has a combustion heat rate (CHR) of 250,000 btu/hr-ft2 uses 2,900 lbs/hr of coal (HHVaf =8,750 btu/lb). If the net effective width of the travelling grate stoker is 7 ft. What is the net effective length of the stoker inside the furnace (exclude preheating and post burning length) . ft? a) 14.5 b) 12.5 c) 13.5 d) 11.5 380. Flue gas flow of 114,150 cu.m./hr from a coal-fired burner is conveyed to a rotary dryer by a hot air duct. Flue gas designed velocity is 9 m/sec. What is the diameter of the hot flue gas duct. In m?

a) 2.1 b) 1.6 c) 2.6 d) 3.1 381. At an iron ore sintering plant in Mindanao, flue gas from the sinter cooler at 450 deg C (163 MCal/MT Iron ore feed) can be recovered in a heat recovery system to generate power. If the gas leaves the Waste Heat boiler (WHB) at 175 deg C (63.4 MCal/MT iron ore feed). What is the WHB efficiency? Neglect heat losses? % a) 61 b) 81 c) 71 d) 91 382. Steam condenser with a condensing capacity of 84,400 kg/hr, 700mmHg (vac) and latent heat of 2408 KJ/kg of exhaust steam uses 6,700 m3/hr of seawater for cooling. What is the increase in seawater temperature at outlet of condenser. oC a) 7.25 b) 5.0 c) 9.5 d) 3.0 383. Steam condenser with a condensing capacity of 84,400 kg/hr, 700mmHg (vac) and latent heat of 2408 KJ/kg of exhaust steam uses seawater for cooling. What is the volume of seawater, cu.m./hr, if the increase in seawater temperature at outlet of condenser is 7.25 deg C? a) 6,700

b) 7,300 c) 7,000 d) 6,400 384. A steam condenser with a cooling surface of 2000 m 2, condensing capacity of 84,400 kg/hr and vacuum of 700mm Hg and cooling seawater flow of 6700 m3/h is to be replaced to increase capacity. The Steam turbine will be expanded to 120,000 kg/hr, same conditions. What is the required cooling surface, sq. m, of the new condense? a) 2,844 b) 2,644 c) 2,744 d) 2,944 385. A steam condenser with a cooling surface of 2000 sq.m., condensing capacity of 84,400 kg/hr and vacuum of 700mm Hg and cooling seawater flow of 6700 m3/h is to be replaced to increase capacity. The Steam turbine will be expanded to 120,000 kg/hr, same conditions. What is the required cooling seawater flow, cu.m./hr, for the new condenser? a) 9,526 b) 9,026 c) 10,026 d) 8,526 INDUSTRIAL AND HOTEL BOILERS 386. A noodle manufacturing plant in Tarlac requires steam (70 psig, 898 btu/lb latent heat of steam) for its noodle lines, steamers and

fryers totalling a heat load of 19,285,000 Btu/hr. What boiler capacity in BoHP is required if there is 30% capacity allowance? a) 750 b) 550 c) 650 d) 850 387. A noodle manufacturing plant in Tarlac requires steam (70 psig, 898 btu/lb latent heat of steam) for its noodle lines, steamers and fryers totalling a heat load of 19,285,000 Btu/hr. What boiler capacity in Lbs/hr steam is required if there is 30% capacity allowance? a) 27,900 b) 25,900 c) 29,900 d) 23,900 388. What is the BoHP required for a hotel laundry facility requiring a steam load of 2100 kgs/hr? Assume factor of evaporation, FE =1.0. a) 134 b) 114 c) 124 d) 104 389. What is the BoHP required for a hotel facility requiring a steam load of 7800 kgs/hr for its hot water and laundry facility? Assume factor of evaporation, FE =1.0. Solution: (7800 kgs/hr x 2.205 lbs/kg)(1 BoHP-hr) = 498.5 BoHP 34.5 lbs

a) 500 b) 450 c) 400 d) 550

390. A hotel laundry room calorifier, 4.3 m3 capacity shall be started from cold (cold start) from 72 deg F to a final temperature of 162 deg F using steam. What is the heat input to the calorifier? BTU. a) 853,335 b) 803,335 c) 903,335 d) 953,335 391. A hotel laundry room calorifier, 4.3 m3 capacity shall be started from cold (cold start) from 72 deg F to a final temperature of 162 deg F using steam at 60 psig (latent heat of 904.5 btu/lb). What is the steam required if boiler/heat transfer efficiency is 85%. lbs a) 1,110 b) 1,310 c) 1,210 d) 1,010 392. A hotel hot water system calorifier, 15 m3 capacity shall be started from cold (cold start) from 68 deg F to a final temperature of 164 deg F using steam. What is the heat input to the calorifier in BTU?. a) 3,175,200

b) 2,975,000 c) 3,075,200 d) 3,275,000 393. A hotel hot water system calorifier, 15 m3 capacity shall be started from cold (cold start) from 68oF to a final temperature of 164 oF using steam at 60 psig (latent heat of 904.5 btu/lb). What is the steam required if boiler/heat transfer efficiency is 85% in lbs? a) 4,130 b) 3,930 c) 4,330 d) 3,730 394. The laundry, kitchen and calorifier of a hotel requires 6,210 lbs per hour of steam. What is the BoHP required?. Assume factor of evaporation, FE =1.0. a) 180 b) 200 c) 190 d) 170

395. What is the required steam line main header going to a hotel laundry facility requiring 2102 kg/hr of steam at 8 bar g (spec. volume = 0.215 m3/kg). Velocity of steam is kept within 25 m/sec? mm a) 80 b) 50 c) 100 d) 125

396. What is the required diameter of a steam line main header (Inches) from a boiler generating 17 mt/hr of steam at 8 bar g (spec. volume = 0.215 m3/kg). Velocity of steam is to be kept within 20 m/sec? a) 10 b) 6 c) 12 d) 8 397. What is the required diameter of a steam line main header (Inches) from a boiler generating 45.5 mt/hr of steam at 40 bar g (spec. volume = 0.0497 m3/kg). Velocity of steam is to be kept within 20 m/sec. a) 8 b) 6 c) 10 d) 12 398. An industrial 4-pass firetube boiler is required to provide an output heat of 16,700,000 btu/hr for process needs. What is the steaming capacity, in lbs/hour if latent heat of steam is 970.4 btu/lb? a) 17,209 b) 16,209 c) 18,209 d) 15,209 399. A coconut oil mill in Mindanao has a total steam demand of 8,132 kgs per hour at 10 barg, 186 oC. Heat needed to produce the steam from 70oC feedwater to 10 barg, 186 oC steam is 656 kCal/kg steam. Fuel used is coal at HHVAF=4,800 Kcal/Kg. What is the fuel consumption if boiler efficiency is 80%. Kgs/hr

a) 1,390 b) 1,290 c) 1,490 d) 1,190 400. An abaca pulp mill in Leyte has a total steam demand of 10,950 kgs per hour. What is the Boiler horsepower, BoHP of the industrial boiler to produce the steam required. a) 700 b) 500 c) 600 d) 800 401. An abaca pulp mill in Leyte has a total steam demand of 10,950 kgs per hour at 10 barg, 186 oC. Heat needed to produce the steam from 70oC feedwater to 10 barg, 186 oC steam is 656 kCal/kg steam. Fuel used is coal at HHVAF=4,650 Kcal/Kg. What is the fuel consumption if boiler efficiency is 85%. Kgs/hr a) 1,817 b) 1,617 c) 1,717 d) 1,917 402. An 800 BoHP industrial boiler produced 13,760,000 kgs of steam over a 3-month period. Total power used to operate pumps and ancillary equipment was 292,500 kw-hrs over the same period. What is the unit power consumption per Metric Ton (MT) of steam produced? Kwhr/mt a) 21.26 b) 25.26 c) 23.26

d) 19.26 403. The industrial boiler for an abaca pulp mill in Leyte produced 42,573,600 kgs of steam for the period Jan – June 2016. Its ancillary equipment consisting of pumps, fans and heaters consumed a total of 1,234.6 MW-Hr of power. What is the unit power consumption per Metric Ton (MT) of steam produced? Kwhr/MT a) 29 b) 25 c) 33 d) 21 404. A dual-fired boiler using bunker fuel (HHV = 10,300 kCAL/li and 85% efficiency) or coal (P5.00/kg cost, HHV = 4,700 Kcal/kg and 80% efficiency). At what fuel cost per liter of bunker will the unit cost of producing steam, P/kg steam, be equal? li a) P11.64 b) P 15.64 c) P13.64 d) P 17.64 405. In a wood processing plant in Surigao del Sur, a wood-fired boiler using wood barks (HHV = 2450 Kcal/kg , 65% eff and P2.75/kg incidental cost) or bunker fuel (HHV = 10,300 kCAL/li and 85% efficiency) can be used to provide steam to the process. At what fuel cost per liter of bunker will the unit cost (in P/kg steam) using bunker fuel be equal to using wood bark? li a) P15.12 b) P 11.12 c) P13.12 d) P 17.12

406. A forced-circulation Waste Heat Boiler in a copper smelter is operating at 50 barg. MCR is 56 mtph of steam and design circulation volume is 18 mt feedwater circulated per MT of steaming capacity. What is the required boiler circulation pump capacity, in GPM including 15% allowance. a) 5,100 c) 4,600 b) 4,100 d) 5,600 407. A garbage-to-power biological conversion facility is being designed to process 5 MT of garbage daily with an estimated biogas production rate of 1 cu.m. of biogas for every 10 kgs of garbage and each cu.m. of biogas produces 2 kwhr of electricity. What is the value of electricity produced annually (335 operating days per year) If cost of power is P14/kwh? pesos. A. 4,690,000 B. 5,110,000 C. 4,270,000 D. 4,410,000 408. A ball mill with 10.5 ft inside diameter is used for raw milling of limestone feedstock in a cement plant. Critical speed of the ball mill is given as n=76.6/√Di. What is the critical speed of this ball mill. RPM a) 23.6 b) 25.6 c) 21.6 d) 19.6

409. A ball mill in a cement plant is running at 17.89 RPM. It is being driven by an girth gear (204 teeth) driven by a pinion gear (25 teeth). What is the pinion gear speed to attain the ball mill operational RPM? a) 146 b) 126 c) 166 d) 106 410. A white cement plant in Saudi Arabia produces 950 metric tons per day of product. Average power consumption is 196.65 MW-hr per day. What is the power consumption per ton, kwhr/MT of product? a) 207 b) 197 c) 217 d) 187 411. A white cement plant in Saudi Arabia produced 285,430 mt of product in 2015. Crude oil fuel consumption for the same period was 49,936,000 liters. What is the unit crude oil consumption per ton of product? a) 175 c) 155 b) 195 d) 135 412. Determine the height of a stack needed for the flue gas with temperature of 150oC if draft required is 1”Aq at barometric pressure of 29.92 inch Hg and ambient air temperature is 30 oC. Design parameters are as follows: ft

1. Flue gas temperature in deg R F = 762 deg R 2. Ambient air temperature in deg R o 546 R 3. Barometric pressure in “Hg 4. Draft required in inch water Use the formula Height, ft = _ds in “Aq___ T in oR (0.256) x p x K

Tg = 150 deg C= 302 deg Ta = 30 oC

= 86oF

=

p = 29.92 inch Hg ds = 1 inch Aq where: K = 1/Ta – 1/Tg

a. 252 b. 300 c. 200 d. 150 413. In a Desulfurization Plant, determine the draft (“Aq) of a stack 100m high with gas with temperature of 40 deg C and barometric pressure of 29.92 inch Hg & ambient air temperature is 30 deg C. What is the draft produced by the stack, in inch Aq? Given parameters are as follows: 1. Flue gas temperature in deg R Tg = 40 deg C = 104 deg F = 564 deg R 2. Ambient air temperature in deg R Ta = 30 deg C = 86 deg F = 546 deg R 3. Barometric pressure in “Hg p = 29.92 ”Hg Use the formula Height, ft = _ds in “Aq___ T in oR (0.256) x p x K

where: K = 1/Ta – 1/Tg

a. 0.147 b. 0.20 c. 0.10 d. 0.30 414. A 5-star hotel has an average guests of 1,200 per day. The average sewer flow per capita is 0.35 cu.m.; BOD5 loading is 0.08 kg/capita and TSS loading is 0.09 kg/capita per day. What is the average sewer flow, Qave in liters/sec? a. 4.86 b. 291.6 c. 96 d. 108 415. A 4-star hotel has an average guests of 1,200 per day. The average sewer flow per capita is 0.35 cu.m.; BOD5 loading is 0.08 kg/capita and TSS loading is 0.09 kg/capita per day. What is the BOD5 loading in Kgs/day? a. 96 b. 291 c. 480 d. 108 416. A 4-star hotel has an average guests of 1,200 per day. The average sewer flow per capita is 0.35 cu.m.; BOD5 loading is 0.08 kg/capita and TSS loading is 0.09 kg/capita per day. What is the TSS loading in Kgs/day? a. 108 .b. 291 c. 96 d. 48 417. A Water Treatment and Recycling Plant is designed to treat 38% of the water consumption. If the water being processed by the

industrial plant is 5,000 m3/day, what should be the designed capacity of the recycling plant , in mt per hour, if it operates at 16 hrs per day? a. 118.75 b. 108.75 c. 181.75 d.128.75 418. In a design of a cooling tower, the following parameters are given: Temp of water entering CT T in = 40 deg C Temp of water leaving CT T out= 33 deg C Wet bulb temperature, T wb =30 deg C What is the EFFECTIVENESS of the cooling tower in %? a. 70 b. 30 c. 60 d. 100

419. A PVC resin company at the Petrochem Park, Mariveles, Bataan uses a 1200 BoHP biomass boiler for its operation to reduce it fuel and utility costs. If factor of evaporation, FE = 1.04, What is the steam rating in kgs/hr of this boiler? a) 18,000 b) 16,000 c) 20,000 d) 14,000

420. The sprocket of the intake drag chain conveyor at a flour mill has a pitch diameter, Dp of 440mm and operates at 35 RPM. What is the speed of the drag chain in meter per second?

a) 0.8 b) 0.6 c) 1.0 d) 1.2 421. The intake drag chain conveyor of a flour mill has a working cross area (width of chain x height of wheat material) of 0.0672 sq.m. and a conveyor speed of 48.38 m/min. Bulk density of wheat is 0.77 MT/m3. What is the drag chain capacity, MT/Hr. a) 150 b) 130 c) 170 d) 110 422. In a copper foil manufacturing facility at the Laguna Technopark, a heat exchanger is used to cool 212 m3/hr copper sulfate solution from 60 deg C to 55 deg C. If SG = 1.3 and CP = 4.01 KJ/kg-C, What is the KW rating of the heat exchanger. a) 1,535 b) 1,735 c) 1,635 d) 1,435 423. In a copper foil manufacturing facility at the Laguna Technopark, a heat exchanger rated at 1,535 KW capacity is used to cool copper sulfate solution. What is the cooling water flow required if temperature going in is 35 deg C and temperature out is 40 deg C?. m3/hr a) 264

b) 304 c) 284 d) 244 424. A belt conveyor designed to handle coal follows the capacity formula (Metric) : Conveyor Capacity =0.000404Sb 2 tons/hr. If speed S is 100 m/min and desired capacity is 600 tons/hr, what should be the belt width in centemeter for this belt conveyor? cm a) 120 b) 90 c) 100 d) 75 425. A belt conveyor designed to handle coal follows the capacity formula (English) : Conveyor Capacity =0.000875Sb2 tons/hr. If speed S is 328 ft/min and desired capacity is 600 tons/hr, what should be the belt width in INCHES for this belt conveyor?

a) 48 b) 36 c) 42 d) 54 426. A copper foil manufacturing plant uses a parallel flow heat exchanger to cool copper sulphate solution using cooling water as medium. Given data as follows: 1. Fluid name 2. Total flow rate, m3/hr 3. Specific gravity

HOT SIDE Copper sulphate 190 1.3

COLD SIDE Cooling Water 237 1

4. Spec. heat, KJ/Kg-C 5. Temperature in, C 6. Temperature out, C

4.01 60 55

4.18 40 45

428. A copper foil manufacturing plant uses a parallel flow heat exchanger to cool copper sulphate solution using cooling water as medium. Given data as follows:

What is the heat exchange capacity of the heat exchanger in KW? 1. Fluid name 2. Total flow rate, m3/hr 3. Specific gravity 4. Spec. heat, KJ/Kg-C 5. Temperature in, C 6. Temperature out, C

a) 1377 c) 1577 b) 1477 b) 1277 427. A copper foil manufacturing plant uses a parallel flow heat exchanger to cool copper sulphate solution using cooling water as medium. Given data as follows: 1. Fluid name 2. Total flow rate, m3/hr 3. Specific gravity 4. Spec. heat, KJ/Kg-C 5. Temperature in, C 6. Temperature out, C

HOT SIDE Copper sulphate 190 1.3 4.01 60 55

COLD SIDE Cooling Water ? 1 4.18 40 45

What is the cooling water volume required in m3/hr? a) 237 b) 277 c) 257 d) 217?

HOT SIDE Copper sulphate 190 1.3 4.01 60 55

COLD SIDE Cooling Water 237 1 4.18 40 ??

What is the outlet temperature of cooling water in deg C? a) 45.0 b) 50.0 c) 47.5 d) 42.5 429. A copper foil manufacturing plant uses a parallel flow heat exchanger with a capacity of 1,377 KW to cool copper sulphate solution using cooling water as medium. Given data as follows: HOT SIDE COLD SIDE 1. Fluid name Copper sulphate Cooling Water 2. Total flow rate, m3/hr 190 237 3. Specific gravity 1.3 1 4. Spec. heat, KJ/Kg-C ?? 4.18 5. Temperature in, C 60 40 6. Temperature out, C 55 45 What is the specific heat of copper sulphate solution, in KJ/Kg-C? a) 4

c) 6 b) 5 d) 3 430. A newly installed ball mill at a copper mine in Cebu requires cooling of motor and slip ring. Flow rate of 548 lpm (liters per minute) cooling water entering at 27 deg C and leaving at 32 deg C. What is the heat dissipated by motor and slip ring in KW. a) 191 b) 171 c) 181 d) 161

b) 108 c) 118 d) 138 433. A filter press uses 33 cu.m. of 8 bar absolute compressed air in a 5-min cycle. What is the free air requirement, in kgs/min, using the Ideal Gas Law for this filter press, in Kg/min. Temperature is 30 deg C. a) 61 b) 51 c) 56 d) 66 434. A KREBS slurry pump operating at 700 rpm and 60% efficiency is used to pump tailings (SG = 1.58) to a dump. The required capacity is 5,000 gpm and TDH was computed at 175 ft of slurry. What is the BHP required. hp

431. The lubrication system of a ball mill at a copper mine in Cebu requires cooling of it lube oil. Cooling water flow rate of 18.3 m3/hr entering at 30 deg C and leaving at 35 deg C. What is the heat dissipated from the lubrication system in KW?. a) 106 b) 86 c) 96 d) 116 432. The lubrication system of a ball mill at a copper mine in Cebu requires cooling of its lube oil. Cooling water flow rate of 18.3 m3/hr entering at 30 deg C and leaving at 35 deg C. What is the cooling system capacity required allowing for 20% allowance. a) 128

a) 582 b) 482 c) 532 d) 632 435. A FLSmidth KREBS slurry pump is used in a copper mine to move 4,226 m3/hr of slurry (SG=1.58) at a TDH of 150 ft. Pump efficiency is 80%. What is the BHP? hp a) 1,624 b) 1,424 c) 1,824 d) 1,224

d) 1924 436. A FLSmidth KREBS slurry pump is used in a copper mine to move 4,226 m3/hr of slurry (SG=1.58) at a TDH of 150 ft. Pump BHP is 1,624 at 80% efficiency. What is the motor load in KW if motor efficiency is 90%. a) 1,346 b) 1,296 c) 1,396 d) 1,246 437. A FLSmidth KREBS slurry pump is used in a copper mine to move 4,226 m3/hr of slurry (SG=1.58) at a TDH of 150 ft. Pump BHP is 1,624 at 80% efficiency. What is the nearest standard motor rating in KW if motor efficiency is 90% and capacity allowance is 11%? a) 1,500 b) 1,600 c) 1,400 d) 1,750 438. In a flour mill, a pneumatic unloader unloads wheat from barges with a bulk density of 770 kgs/cu.m. From the roots blower catalog, the conveying velocity required for bulk density of 720 kgs/m3 is 1,882 mtr/min while the conveying velocity required for a bulk density of 800 kgs/m3 is 1,981 mtr/min. What would be the appropriate conveying velocity for a bulk density of 770 kgs/m3? a) 1944 b) 1934 c) 1954

439. The head shaft of a drag chain conveyor handling wheat is subjected to a torque T of 1,840 N-m when running at 35 rpm. What is the net power transmitted by the head shaft in KW? a) 6.15 b) 8.15 c) 7.15 d) 5.15 440. An 11 kw x 35 rpm gear reducer drive is used to drive a drag chain conveyor. What is the required nearest standard diameter of the head shaft in INCHES?. a) 3 b) 2 c) 2.5 d) 1.5

441. A biomass boiler produces 36,000 m3/hr of flue gas at 130 deg C. What would be the diameter of the smoke stack if gas velocity is kept within 5 meters/sec? m a) 1.6 b) 2.0 c) 1.8 d) 1.4

442. A centrifugal fan in a lime burning plant in Valencia, Bukidnon generates 15,300 CFM (26,000 m3/hr) and total pressure of 13” wg. What is the HP load on the fan in hp? a) 31.3 b) 35.3 c) 33.3 d) 29.3 443. A mechanical dryer using rice hulls as fuel (HHV =6000 btu/lb) is used to dry palay. If 300,000 btu of energy is used per batch and efficiency is 45%, What is the rice hull fuel consumed per batch in. lbs? a) 111 c) 151 b) 131 d) 161 444. The barometric reading in the Grand Tatio geysers in Chile (13000 ft ASL) measured 8.7 psia local pressure. What will be the height of the column of a mercury barometer? mm a) 450 b) 500 c) 400 d) 550 445. A high rise condominium building has 40 floors and total of 320 m2 per floor How many elevators are required for this building based on 9.3m2/person occupancy? a) 6 b) 4 c) 5

d) 3 446. A high rise condominium building has 40 floors and total of 320 m2 per floor and 28 occupants per floor. How many elevators are required for this building? a) 5 b) 3 c) 4 d) 2 447. What is the maximum number of passengers allowed for elevators with a rated safe load of 2,250 lbs? a) 15 b) 13 c) 14 d) 12 448. What is the net platform area of an elevator with a rated load of 10,000 lbs? (Refer to PMEC 2012, p.605) ft2 a) 88 b) 125 c) 103 d) 81 449. What is the specific gravity of bunker fuel of 15 deg API at 60 deg F? a) 0.966 b) 0.956 c) 0.961

d) 0.976 450. A 200,000 MB (thousand barrels) diesel fuel tank located in Subic Bay has the following given data: a) Diameter, D= 143 ft b) Height, H= 71 ft c) Sp.Gr, G = 0.88 d) Corr all, CA= 0.1 inc e) Material = ASTM A-36 (allowable design stress K = 23,200 psi) a) 1.087 b) 0.987 c) 1.187 d) 0.887 451. A coconut oil mill in Gingoog City, Northern Mindanao, proposes to install a cooling tower for the process. Technical specification of the cooling tower are as follows: a) Temperature entering, T e = 53 deg C b) Temperature leaving, T l = 39 deg C c) Wet bulb temperature Twb =33 deg C What is the CT effectiveness in %? a) 70 b) 74 c) 72 d) 68 452. The RAS Tanura Crude Oil Terminal of Aramco, KSA, has oil tanks of 52.5 million gallons capacity each. Newly delivered crude oil, typical water content of 0.8%, is retained in these tanks for 24 hours to settle the water so that it can be dewatered to 0.20% or less. What is

the minimum gpm of the dewatering pump required to dewater the tank in 5 hours after settlement. a) 1,050 b) 850 c) 950 d) 800 453. The RAS Tanura Crude Oil Terminal of Aramco, KSA, has oil tanks of 52.5 million gallons capacity each. A dewatering pump is used to remove water from the bottom. Lowest level of crude is 10 ft above the pump centreline of liquid (SG = 0.99), vapour pressure is 1.7 psia and total head loss for the system is 9 ft. What is the net positive suction head available, NPSH in. ft? a) 31.3 c) 21.3 b) 25.3 d) 53.3 454. A rotary airlock is used to inject 5 mtph (550 ft3/hr) of wheat bran into a pneumatic conveying system. Rotor material displacement is 0.2 ft3/revolution. What is the nearest RPM of the rotary airlock? a) 46 b) 56 c) 66 d) 36 455. A positive displacement Roots blower, rated at 745 CFM and 14.5 Psi and driven by a 37 KW (50 hp) motor is used for the pneumatic conveying of wheat bran. If the conveying velocity is 5,465 FPM, What is the nearest blowpipe diameter required by the system. ft

a) 5 c) 6 b) 4 d) 8 REFRIGERATION 456. A refrigerator has an EER (Energy Efficiency Ratio) of 10.5. If its heat removal capacity is 2,500 btu/h. What is its power consumption in WATTS? a) 238 b) 208 c) 268 d) 178 457. What is the Energy Efficiency Ratio (EER) of a refrigerator that has a cooling capacity of 2,625 btu/hr when using 250 watts of power. a) 10.5 b) 11 c) 10 d) 8.5 458. A chicken dressing plant in Davao City with a capacity of 2,500 kgs/hr cools fresh birds from 107 deg F to 41 deg F. If specific heat of chicken is 0.79, What is the heat removal capacity required.in Btu/hr? a) 286,770 c) 266,770 b) 306,770

d) 246,770 459. An sterile compressed air system for a carbonated bottling plant uses an Atlas Copco oil free compressor Model ZT22 with a capacity of 137.5 m3/hr ( 81.1 CFM) at 7 barg. Power usage for this set-up is 4 CFM per input horsepower. What is the Motor load in hp, for this compressor a) 20.25 c) 22.25 b) 18.25 d) 24.25 460. A carbonated beverage bottling plant in CDO with a beverage flow rate of 29,650 gal/hr is required to cool the beverage from 86 deg F to 59 deg F. What is the heat load of the beverage in TOR capacity if density of the beverage is 8.66 lbs/gallon and Cp = 0.9 btu/lb-F.? a) 520 b) 540 c) 500 d) 480 461. A large meat processing company in Cebu has a cold storage room with a capacity of 1,973,000 kgs of products to be cooled from -18 deg C to a final temp of -25oC within 16 hours. If average product Cp = 2.2 KJ/kg-K What is the product load in TOR capacity? a) 150 b) 120 c) 180 d) 170

462. A cold storage room with a ceiling area of 380 m2 and outside temperature of 27 deg C (300 deg K) and 7 deg C (280 deg K) inside temperature has a Ufactor = 0.1793 w/m2-K. What is the heat transferred through ceiling in. w? a) 1,363 b) 1,163 c) 1,563 d) 1,763 463. A cold storage room used for fresh pineapple storage has an average product load of 10,500 kgs/hr with initial temperature of 10 deg C and 7.5 deg C final temperature. If the specific heat of pineapple, CP= 3.7 KJ/kg-C, What is the product heat load in KW? a) 27 b) 21 c) 24 d) 30 464. A cold storage room used for fresh pineapple storage has an air infiltration rate equivalent to 0.125 air change per hour. If the room volume is 2,660 m3 and enthalpies of air entering at 29 deg C h o = 94.851 KJ/kg and hi = 34.132 KJ/kg with air density at 1.15 kg/m3, What is the heat load due to air infiltration into the Cold Storage Room in KW?

a) 6.45 b) 5.95

c) 6.95 d) 5.45 465. For an ice making plant in Sorsogon, What is the brine temperature required to freeze water to ice in 48 hours if thickness of the ice block is 11 inches using formula from Kent’s Handbook, Thours=7x2/(32-tb) where x is thickness of the ice block in inches and tb is brine temp in deg F?. a) 14.4 c) 16.4 b) 15.4 d) 17.4

466. An ice plant in Sorsogon City has a brine tank containing 73.32 mt of brine (Cp = 0.892 btu/lb-C). Brine has initial temperature of 76 deg F and 14.4 deg F final temperature. What is the tons of refrigeration (TOR) required to cool the brine tank in 48 hours?. a) 15.4 c) 19.4 b) 17.4 d) 13.4 467. A shell and tube condenser in an ice plant in Sorsogon has a rated Heat Rejection capacity of 1,080,540 btu/hr. Supplier data show

that its heat transfer factor is 174 btu/hr/ft2/F and LMTD of 9 deg F. What is the surface area, A in ft2, of the condenser? a) 690 b) 890 c) 790 d) 590 468. An ice plant in Albuera, Leyte has a cold storage room with a capacity of 60 mt of ice (Cp= 1.9387 KJ/kg-C) and a temperature difference of 7 degC (-3 deg C for ice and -10 deg C for cold storage). What is the heat load of the ice stored inside the storage room for 24 hours in KW? a) 9.4 b) 11.4 c) 10.4 d) 8.4 469. A cooling tower for an ice plant in Albuera Leyte cools entering water from 38 deg C to 29 deg C. Wet bulb temperature of air is given as 25 deg C. What is the cooling effectiveness of the cooling tower in %? a) 69.2 b) 73.2 c) 71.2 d) 75.2 470. A cooling tower used in a Milk manufacturing plant in Cagayan de Oro has a cooling capacity of 1,750,000 Kcal/hr. Temperature of water entering is 36.7 deg C and temperature leaving is 31.1 deg C. Wet bulb temperature is 28 deg C. What is the cooling tower “approach”? deg C

a) 3.1 b) 8.7 c) 5.6 d) 6.7 471. A cooling tower used in a Milk manufacturing plant in Cagayan de Oro has a cooling capacity of 1,750,000 Kcal/hr. Temperature of water entering is 36.7 deg C and temperature leaving is 31.1 deg C. Wet bulb temperature is 28 deg C. What is the cooling tower “effectiveness”? % Solution: Effectiveness = (36.7 – 31.1)/(36.7 – 28) = 5.6/8.7 = 64.4% a) 64.4 b) 84.4 c) 74.4 d) 54.4 472. What freezing method is used to produce ice in a brine tank used in Ice Plants? a) Immersion method b) Contact freezing c) Blast freezing d) Indirect contact 473. What freezing process use spiral belt freezing units? a) Air blast b) Contact c) Immersion d) Indirect contact AIR CONDITIONING

474. What is the Energy Efficiency Ratio (EER) of an AC unit that has a capacity of 11,500 Btu/hr when using 1 kw of power? a) 11.5 b) 10.5 c) 11.7 d) 10.9 475. What is the Energy Efficiency Ratio (EER) of an AC unit that has a capacity of 12,300 Btu/hr when using 1,120 watts of power? a) 11.0 b) 10.5 c) 11.5 d) 10.8

476. In HVAC applications, what is a device for transferring heat from a lower temperature heat source to a higher temperature heat sink? This is opposite to the natural flow of heat from a hot source to a cold sink, but is made possible by the application of an external energy source to drive a thermodynamic refrigeration cycle. a) Heat Pump b) Cooling Tower c) Flash Tanks d) Intercoolers

477. In Heat Pump application, what is the term for the ratio between the heat provided to the sink and the energy required? a) Coefficient of performance (COP) b) Coefficient of heat transfer c) Coefficient of thermal expansion d) Coefficient of friction 478. In Heat Pump application, Electrically-driven heat pumps used for space heating applications in moderate climates usually have a coefficient of performance (COP) of a least _____ at design conditions. a) 3.5 b) 2.5 c) 2.0 d) 1.5 479. An Electrically driven heat pump used for space heating application has a coefficient of performance (COP) of 5.0 at design conditions. This means ____ kWh of heat output for each 1 kWh electricity used to drive the process. a) 5.0 b) 10 c) 2.5 d) 0.2 480. In HVAC applications, Water source heat pumps take energy from the water from buildings through a process using a refrigerant fluid. The measure of performance of a heat pump is called the COP, which is the comparison of the amount of energy used in the system against how much energy it takes out of the air. a) The higher the COP the better the system. b) The higher the COP the worse the system c) The COP does not affect the energy efficiency

d) None of the choices is true

481. A hotel in Metro Manila has a 1.5 hectare of airconditioned space with a cooling load estimated at 11,772,000 BTU/hr. What is the square meter per TOR (tons of refrigeration). a) 15 b) 13 c) 14 d) 12 482. An arena in Metro Manila has a 5,000 sq.m. of air conditioned space with a cooling load estimated at 3,350,000 BTU/hr. What is the square meter per TON (tons of refrigeration). a) 18 b) 16 c) 17 d) 15 483. A hotel with 80 rooms has a heat pump hot water system designed for a capacity of 7,300 liters per hour. Required hot water temperature is 60 deg C while cold water entering is at 27 deg C. Heating time is 3 hours. What is the required heat pump capacity, in KW? Neglect heat losses. a) 93.4 b) 73.4 c) 83.4 d) 103.4

484. A heat pump hot water system designed for a capacity of 93.4 KW. If the COP (Coefficient of Performance) is given as 4.5, what is the power required to drive its pump and ancillary equipment, in Horsepower? hp a) 27.8 b) 21.8 c) 24.8 d) 30.8 VENTILATION 485. Compute the design Breathing zone outdoor airflow required for an office building with 2000 sq.ft. floor area with People Outdoor Air Rate (RP) of 5 CFM per person, occupied by 10 persons and an Area Outdoor Rate (RA) of 0.06 CFM/ft2. a) 170 b) 300 c) 200 d) 400

486. Determine the outdoor air rate required for a single zone AC unit serving an interior 1,500 ft2 conference room with a design occupancy of 70 people. Assume air rate RP of 5 cfm/person, area outdoor rate of 0.06 cfm/ft2 and zone air distribution effectiveness of 1.0. a) 440 b) 360 c) 400 d) 480

d) 2,200 487. In ventilation nomenclature, what is defined as the number of times that the volume of air is replaced in one hour? a) Air change rate b) Ventilation air c) Air infiltration d) Ratio of replacement 488. Using the Air Change Rate method, what is the ventilation air requirement in cu.m./hour of a hospital operating room with a floor area 75 m2 and ceiling height of 3 meters with desired ACR of 15?. a) 3,375 b) 3,600 c) 3,000 d) 4,000 489. Using the Air Change Rate method, What is the ventilation air requirement in cu.m./hour of a school room with a floor area 101 m2 and ceiling height of 3 meters with desired ACR of 66.? a) 20,000 b) 23,600 c) 22,000 d) 24,000 490. Using the Air Change Rate method, What is the ventilation air requirement in cu.m./hour of an office conference room with a floor area 65 m2 and ceiling height of 3 meters with desired ACR of 12.? a) 2,340 b) 2,500 c) 2,000

491. Using the Air Change Rate method, what is the Air Change Rate (ACR) if the ventilation air requirement for a hotel kitchen with a floor area of 50 m2 and ceiling height of 3 m is 2,250 cu.m./hr?. a) 15 b) 8 c) 12 d) 6 492. A compressor room with 2 compressors each driven by 300-kw motors (efficiency = 90%). What is the heat load due to the motors in BTU/hr? a) 204,780 b) 184,780 c) 194,780 d) 174,780 493. A compressor room 6mW x 8mL x 5.5mH requires fresh air ventilation to maintain the environment. ACH (Air change per hour) was determined to be 24. What is the fresh air ventilation requirementin in m3/hr?. a) 6336 b) 5336 c) 7336 d) 8336

494. A Tissue Converting Plant in Cebu has a warehouse 30mW x 60mL x 9mH requires fresh air ventilation to maintain the environment. Area outdoor air rate is 0.06 cfm/ft2. What is the fresh air ventilation requirement in CFM?. a) 1,160 b) 3,160 c) 2,160 d) 4,160 495. A school classroom 20ft W x 30 ft L with a seating capacity of 50 requires fresh air ventilation to maintain the e in nvironment. People outdoor air rate is 7.5 cfm/person and area outdoor air rate is 0.06 cfm/ft2. What is the fresh air ventilation requirement in CFM? a) 411 b) 211 c) 311 d) 511

496. A convenience store with 1,100 ft2 of floor space and peak occupancy of 25 people is to be provided with fresh air ventilation. If the people outdoor air rate, Rp is 7.5 cfm/person and area outdoor air rate, RA is 0.12 cfm/ft2, What is the fresh air ventilation requirement in, CFM?. a) 320 b) 520 c) 420

d) 220 497. The Executive Suite of a 5-star hotel with 450 ft2 of floor space and peak occupancy of 4 people is to be provided with fresh air ventilation. If the people outdoor air rate, R p is 5 cfm/person and area outdoor air rate, RA is 0.06 cfm/ft2, What is the fresh air ventilation requirement in CFM? a) 50 b) 20 c) 30 d) 40 498. A premier condo with 1,090 ft2 of floor space and peak occupancy of 4 people is to be provided with fresh air ventilation. If the people outdoor air rate, Rp is 5 cfm/person and area outdoor air rate, RA is 0.06 cfm/ft2, What is the fresh air ventilation requirement in CFM? a) 85 b) 65 c) 75 d) 55 499. A ventilation fan rated at 4600 CFM (2.17 m 3/s) and 1.5” WG. What is the static pressure head (hs) in equivalent meters of air if air density is 1.2 kg/m3. m a) 31.7 b) 21.7 c) 41.7 d) 11.7

500. What is the velocity head, hV of a ventilation fan with a discharge velocity of 5m/s in equivalent meters of air in m? a) 1.274 b) 3.274 c) 2.274 d) 4.274

501. What is the brake HP of a ventilation fan with a capacity of 2.17 m3/sec, a total head of 33m air and a fan efficiency of 50%? hp a) 2.26 b) 2.86 c) 2.56 d) 1.96 502. What is the brake HP of a ventilation fan with a capacity of 4600 CFM, a total head of 1.56 inch WG and a fan efficiency of 50% in hp? a) 2.26 b) 2.86 c) 2.56 d) 1.96 503. A 2-storey commercial building located in Talisay City, Cebu, with an area of 610 m2 per floor has a computed heat load of 73 KW for the ground floor and 115 kw for the 2nd floor. What would be the TOR rating for the HVAC of the building if 10% capacity allowance is provided? Chose the nearest standard size.

a) 60 b) 70 c) 50 d) 80 504. What is the efficiency in percent in % of a cooling tower for a commercial building HVAC facility has the following data? 1) Water entering CT = 37 deg C 2) Water leaving CT = 31 deg C 3) Wet bulb temp, = 28 deg C a) 66.7 b) 61.7 c) 56.7 d) 71.7 505. A cooling tower for a commercial building HVAC facility has the following data: a) Water entering CT = 37 deg C b) Water leaving CT = 31 deg C c) Wet bulb temp = 28 deg C What is the CT’s Range and Approach, deg C? a) 6, c) 7, b) 5, d) 8,

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