Coaching Notes Math 3.pptx · Version 1.pptx

A parallelogram with oblique triangles and only the opposite sides are equal. A. B. C. D.

circle pyramid rhomboid polygon

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The velocity of a liquid with discharges under a head is equal to the velocity of the body which falls in the same head. A. B. C. D.

Lenz law Archimedes principle Torrecelli’s theorem Bernoulli’s principle

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How much of a 40% solution of alcohol and how much of an 80% solution should be mixed to give 150 liters of a 50% solution?

A. B. C. D.

112.5 liters / 37.5 liters 121.5 liters / 53.7 liters 211 liters / 3.5 liters 212 liters / 53.7 liters

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How much water must be evaporated from the 18 kg of 20% salt solution to produce a 50% solution. A. B. C. D.

2.25 kg 5.0 kg 7.5 kg 10.5 kg

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A series of numbers having the common ratio A. B. C. D.

geometric progression arithmetic progression harmonic progression no answer

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Find the last term of the series of numbers 2, 5, 8, … to the 8th term. A. B. C. D.

20 21 22 23

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A series of numbers having the common difference. A. B. C. D.

harmonic progression geometric progression arithmetic progression none of these

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Neglecting friction head, sum of pressure head, velocity head and elevation head of a point is equal to the sum of pressure head, velocity head and elevation head of another point. A. B. C. D.

Archimedes principle Lenz law Bernoulli’s principle Pascal law

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A body partly or wholly submerged in a liquid buoyed up by a force equal to the weight of the liquid displaced. A. B. C. D.

Pascal law Archimedes principle Pressure Charles law

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The ratio of the peripheral velocity of a jet is called A. B. C. D.

speed ratio velocity ratio peripheral coefficient hydrodynamics

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It

is straight line towards approaches but never meets.

A. B. C. D.

directrix major axis asymptotes conjugate axis

a

curve

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It is the rule used for differentiating a function, that is, if z is function of y and y is function of x, then dz/dx = (dz/dx)(dy/dx) A. B. C. D.

L. Hospital’s rule Chain rule Crammer’s rule Slide rule

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Two triangles are congruent if they satisfy _________. A. B. C. D.

SAS rule ASA rule SSS rule any of the above

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The process of plotting points to give rise to the graph of a curve. it includes the use of techniques of symmetry, maxima and minima, curvature and asymptote.

A. B. C. D.

drafting curve tracing dimensional analysis correlation

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The special type of quadrilateral with two pairs of adjacent sides equal. A. B. C. D.

parallelogram trapezoid rectangle kite

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A series of numbers which are perfect square such as the series ( 1, 4, 9, 16, 25 . . . ) A. B. C. D.

Fermat’s numbers Euler’s numbers Fibonacci’s numbers Fourier’s series

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It is a point on the axis midway between the focus and the directrix of the parabola. A. B. C. D.

vertex origin latus rectum eccentricity

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The angle between the horizontal and the line of sight to the observed point if the observed point is below the horizontal of the observer.

A. B. C. D.

angle of elevation angle of depression angle of inclination none of these

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The highest point of figure with respect to the base or plane of the base. A. B. C. D.

apothem peak apex altitude

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A method of solving linear equations of several unknown simultaneously using determinants or matrices. A. B. C. D.

Binomial theorem Coulomb’s law Cramer’s rule Chain rule

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Geometric figures having the identical shape and size. A. B. C. D.

similar conjugate concurrent congruent

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An equilateral polygon or sometimes known as a regular polygon. A. B. C. D.

equigon isogon perigon decagon

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The base of a number system.

A. B. C. D.

radius radix characteristics matrix

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Force acting on a single point.

A. B. C. D.

coplanar forces compressive forces concurrent forces shearing forces

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It has the same magnitude as the resultant force, but in opposite direction. A. B. C. D.

couple conjugate equilibrant concurrent

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The Newton’s first law in motion.

A. B. C. D.

law law law law

of of of of

inertia action and reaction mass and acceleration conservation and momentum

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The rate at which the body or substance either absorbs or produces energy. A. B. C. D.

impulse momentum work power

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The metric equivalent of Joule is equal to

A. B. C. D.

newton-meter watt-second volt-coulomb all of the above

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20000 PS to hp: A. B. C. D.

17920 19720 17290 19270

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A rivet in double shear

A. is always hand driven B. has twice the strength as a rivet in shear C. has the same strength as a rivet in a single shear D. has four times the strength of a rivet in a single shear

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The product of n consecutive integers from 1 to n. A. B. C. D.

serial integral differential factorial

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It is the one having all terms of the same degree for polynomials as x³ + x²y +y³ A. B. C. D.

identical heterogeneous homogeneous partial

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The operation of root extraction.

A. B. C. D.

evolution involution revolution devolution

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The chemical most commonly used to spread sedimentation of sewage is A. B. C. D.

lime copper sulfate sulfuric acid ethylene blue

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Most of the bacteria in sewage are

A. B. C. D.

saprophytic dangerous parasitic pathogenic

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One of the two types of non-material nuclear radiation is A. B. C. D.

gamma radiation transmutation radiation Walton radiation betatron radiation

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If you wished the temperature distribution within a room to be as even as possible, you would blow hot air into the room near the

A. B. C. D.

floor ceilings walls door

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Which is not a qualification for an applicant for ME Board Examination? A. B. C. D.

Certified Plant Mechanic Holder of BSME degree At least 18 years of age A citizen of the Philippines

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The maximum power rating of mechanical works or plant that can be tended or operated by a certified plant mechanic is A. B. C. D.

37.3 kW 298.4 kW 223.8 kW 119.9 kW

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The most important factor in determining high temperature behavior of an alloy is A. B. C. D.

dispersion ionization crystallization composition

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With regards to corrosion of passivation is the process that A. B. C. D.

metals,

inhibits further deterioration intensifies deterioration alters the grain size of the metal changes metal composition

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At relatively high temperatures and low rates of strains, structures will perform better if their material is A. B. C. D.

coarse grained fine grained behavior is independent of grain none of the above

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Intermittent sand filters are primarily used to A. B. C. D.

oxidized putrescible matter supply fertilizers to farmers remove solids from sewage neutralize sludge

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The gas from sludge digestion tanks is mainly composed of A. B. C. D.

nitrogen carbon dioxide methane oxygen

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Quantity of chlorine in parts per million required to satisfactorily chlorinate sewage is usually A. B. C. D.

125 - 150 0 - 25 65 - 90 30 - 50

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Ratio of oxygen available to the oxygen required for stabilization of sewage is called A. B. C. D.

concentration factor relatives stability oxygen – ion concentration bacterial stability factor

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In the design of grit chambers

A. B. C. D.

maximum velocity of flow is 1 ft/s baffles are essential temperature is an important factor retention period should be at least 30 min.

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The greatest unit pressure the soil can continuously withstand A. B. C. D.

bearing strength yield point ultimate strength point of rupture

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An equation in which a variable appears under a radical sign A. B. C. D.

Irrational equation Radical equation Irradical equation Literal equation

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The logarithm of 1 to any base is

A. B. C. D.

infinity indeterminate zero one

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All circles having the same center but unequal radii are called A. B. C. D.

concentric circles encircles concyclic tangent circles

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A plane closed curve, all points of which are the same distance from a point within called the center is A. B. C. D.

arc radius circle chord

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A statement of equality between two ratios

A. B. C. D.

power factor evaluation proportion theorem

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A polygon with fifteen sides

A. B. C. D.

nonagon decagon pentedecagon dodecagon

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The first derivative of kinetic energy with respect to time A. B. C. D.

force momentum work power

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The point where the second derivative of function is equal to zero A. B. C. D.

inflection point minima point of intersection maxima

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Linear momentum is a product of mass and velocity and this can be expressed also as a function of A. B. C. D.

force, force, force, force,

time velocity displacement acceleration

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The name of a vector representing the sum of two vectors A. B. C. D.

tangent resultant scalar tensor

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A curve generated by a point which moves in uniform circular motion about an axis while traveling with a constant speed parallel to the axis.

A. B. C. D.

epicycloid helix cycloid Spiral of Archimedes

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The tendency of a liquid surface to contract A. B. C. D.

surface tension air resistance gravity viscosity of fluid

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Measure of fluid resistance when acted upon by an external force A. B. C. D.

viscosity density flash point tackiness

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An

instrument for temperature gases.

A. B. C. D.

pyrometer ammeter odometer anemometer

measuring

high

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A rectangle with equal sides

A. B. C. D.

rectangle square rhombus trapezoid

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The base unit for mass in the SI system of measurement A. B. C. D.

Newton hyls kilogram Joule

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Absolute viscosity is a derived unit describe as A. B. C. D.

Pascal - second Newton per meter square meter per second Watt per meter Kelvin

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Property of the body which measures its resistance to change in motion. A. B. C. D.

acceleration mass rigidity weight

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Chemical method of feedwater treatment which uses calcium hydroxide and sodium carbonate as reagents. A. B. C. D.

demineralization process lime soda treatment thermal treatment ion exchange treatment

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Date of the signing of the new Mechanical Engineering law A. B. C. D.

February 12, 1998 February 21, 1998 February 15, 1998 February 28, 1998

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If equals are added to equals, the sum are equal. A. B. C. D.

theorem postulate axiom corollary

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A straight line perpendicular to one of two parallel planes is perpendicular to the other also A. B. C. D.

theorem postulates axiom corollary

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Sum of the sides of a polygon. A. B. C. D.

hexagon circumference perimeter square

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A quadrilateral whose opposite sides are equal. A. B. C. D.

parallelogram triangle median trapezoid

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The PSME code 1993 defines the five grades of Commercial Fuel Oils and also provide specifications for underground and above ground Oil Storage Tanks such as for maximum capacity of 1100 gallons. The tank thickness of the metal shall be

A. B. C. D.

Number 12 gage Number 14 gage Number 16 gage Number 18 gage

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Kinematic viscosity is an SI derive unit described as A. B. C. D.

Pascal second watt per meter Kelvin square meter per second Newton per meter

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Locus of points on a side which rolls along a fixed line. A. B. C. D.

cycloid cardioid epicycloid hypocycloid

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A specimen is subjected to a load. When the load is removed, the strain disappears. The material is A. B. C. D.

ductile elastic plastic at high modulus of elasticity

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Study of motion without reference to the forces which causes motion. A. B. C. D.

Kinematics Hydrodynamics Statics Aerodynamics

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A cantilever beam with a concentrated load at the free end, the moment is A. B. C. D.

maximum at the wall constant along the beam maximum at the free end maximum at midspan

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The loss weight of a body submerged in a fluid is A. B. C. D.

equal to the weight of the body displaced independent of the volume of the body proportional to the weight of the body none of the above

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A line segment joining two points on a circle

A. B. C. D.

sector chord arc tangent

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It is defined as the motion of a rigid body in which a straight line passing through any two of its particle always remains parallel to its initial position

A. B. C. D.

Rotation Plane motion Translation Kinematics

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Foaming is caused by

A. B. C. D.

chemicals scales hard water soft water

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High alkalinity water in a boiler causes

A. B. C. D.

pitting fire cracks corrosion caustic

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Priming is caused by

A. B. C. D.

too much blowdown cold feedwater low hardwater load swings

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A thermodynamic system which undergoes a cyclic process during a positive amount of work is done by the system. A. B. C. D.

heat pump heat engine reversed rankine cycle reversible - irreversible process

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Amount of heat needed to raise the temperature of 1 pound of that substance one degree Fahrenheit is A. B. C. D.

BTU Specific heat Relative heat Latent heat

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The study of the condition of air and moisture in the atmosphere. A. B. C. D.

Thermodynamics Atmospherics Gas dynamics Psychrometrics

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The gage used to measure 0.001 to 1 atmosphere pressure A. B. C. D.

Bourdon Mercury manometer Water manometer Metallic diagram

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Water in an open temperature is A. B. C. D.

glass

at

a

room

saturated liquid compressed liquid liquid with quality is zero liquid with quality is unity

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Which of the process where work is zero

A. B. C. D.

isopiestic isometric isentropic polytropic

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In an internal combustion engine, the stroke that discharges gas inside the cylinder A. B. C. D.

power intake compression exhaust

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An adiabatic process with no work done is

A. B. C. D.

throttling isobaric isometric isothermal

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In a system, the sum of internal energy and the product of pressure and volume is A. B. C. D.

entropy enthalpy work heat

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Force on a submerged area A. B. C. D.

weight fluid pressure fluid force density

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Hydraulic power is expressed in whp in English units. In SI it is expressed in A. B. C. D.

hp wkw kwh whp

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One English hp is 746 watts. In SI, one metric hp is A. B. C. D.

736 watts 746 watts 756 watts 760 watts

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One mechanical hp is equivalent to

A. B. C. D.

16 boiler hp 14.51 boiler hp 13.15 boiler hp 24 boiler hp

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One mm of hg is equivalent to A. B. C. D.

13.33 kPa 3.313 kPa 0.1333 kPa 1.333 kPa

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Which of the following does not belong to the group? A. Class A Fire - fire caused by light combustible material like paper and wood B. Class B Fire - fire caused by oil and other hydrocarbon C. Class C Fire - fire caused by electrical fire D. Class D Fire - fire caused by LPG

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What is the color of steam pipe?

A. B. C. D.

red green silver gray violet

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Color for water pipes

A. B. C. D.

green orange violet ultra red

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An increase in heat enthalpy of a substance when it undergoes a change of phase at constant pressure and temperature. A. B. C. D.

heat heat heat heat

of of of of

fusion crystallization vaporization transformation

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The ideal reversible Carnot Cycle revolves four basic processes. They are A. B. C. D.

two isentropic all isentropic all isothermal two isentropic and two isothermal

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The origin of the energy conservation equation used in flow system. A. B. C. D.

1st law of thermodynamics 2nd law of thermodynamics Newton’s 2nd law of motion Newton’s 1st law of motion

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Coefficient of friction for dry surfaces

A. does not depend on the material B. depends on the material and on the finish condition of the surface C. depends only on the finish condition of the surface D. depends on the composition of the material only

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For an existing boiler installation the lowest of safety permissible shall be: A. B. C. D.

3.0 3.5 4.0 4.5

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Ratio between the average load and total available capacity. A. B. C. D.

capacity factor load factor demand factor diversity factor

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Ratio between the average load and the peak load. A. B. C. D.

load factor use factor demand factor capacity factor

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Ratio between the actual demand load to the connected load. A. B. C. D.

use factor demand factor capacity factor utilization factor

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The new Mechanical Engineering law which was signed last February 12, 1998 is known as A. B. C. D.

RA 8491 RA 8495 RA 8499 RA 8492

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Under the provision of PSME code 1993, what is the color symbol for air piping? A. B. C. D.

silver gray green light blue red

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Which of the following is the basis of Bernoulli’s law of fluid flow? A. B. C. D.

Fouriers law principle of mass conservation continuity equation principle of energy conservation

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Which of the following is not a unit of work? A. B. C. D.

dyne work watt - second Newton - meter

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What condition exists throttling process? A. B. C. D.

in

an

adiabatic

variable enthalpy constant enthalpy constant entropy volume constant

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Specific gravity of a substance is the ratio of its density to the density of A. B. C. D.

mercury water gas air

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Instrument used in determining the specific gravity of any substance A. B. C. D.

hydrometer westphal balance psychrometer all of the above

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The weight of the column of air above the earth’s surface. A. B. C. D.

aerostatic surface air pressure atmospheric pressure wind pressure

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Gas being heated at constant volume

A. B. C. D.

isentropic adiabatic isobaric isometric

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A process that has no heat transfer A. B. C. D.

reversible adiabatic polytropic isometric

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Heat normally flowing from a high temperature body to a low temperature body wherein it is impossible to convert heat without other effects is: A. B. C. D.

1st Law of Thermodynamics 3rd Law of Thermodynamics 2nd Law of Thermodynamics Zeroth Law

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Form of energy associated with kinetic energy of the random motion of large number of molecules. A. B. C. D.

heat heat of fusion kinetic energy enthalpy

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At what temperature are two temperature scales, degrees Celsius and Fahrenheit equal? A. B. C. D.

- 20 deg C - 40 deg C - 30 deg C 40 deg C

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Turboeject engine thrust is produced by: A. B. C. D.

thrust reaction of the turbine blading ram effect of the intake fuel additional weight of the injected fuel acceleration of the cases through the engine

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A process in which water vapor is added to the air stream by adiabatic evaporation A. B. C. D.

evaporative cooling sensible cooling humidifying none of above

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Each miniature boiler shall be provided with a blow off connection not less than 12.7 min. iron size in direct connection with the A. B. C. D.

lowest water space 5 mm above the lowest water space side of the lowest water space none of the above

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Where ground water or surface water are used for feed water, water hardness of 0 – 10 ppm shall be considered an alkalinity

A. B. C. D.

ph 10 to ph 11 ph 9 to ph 10 ph 8 to ph 9 ph 8 to ph 10

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continue here

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The resistance that a fluid offers to flow as a consequence of its internal friction forces is called ______. A. B. C. D.

Viscosity Pour point Viscosity index Lubricity

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The level of solubility of refrigerants in an oil is a function of temperature and ______. A. B. C. D.

Viscosity Dielectric strength Pour point None of the above

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The rate at which the viscosity of an oil changes as its temperature changes is called _______. A. B. C. D.

Viscosity Pour point Viscosity index Floc point

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Oil foaming is a consequence of _______

A. B. C. D.

Oil temperature Refrigerant solubility Refrigerant pressure Oil viscosity

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Reducing refrigerant migration during the off cycle _____ oil foaming. A. B. C. D.

Increases Decreases Has no effect on Varies

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Which of the following strategies will reduce oil foaming in a system? A. B. C. D.

Pump-down cycle Oil additives Crank case heaters All of the above

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Which of the following oils is not normally used with HFC refrigerants A. B. C. D.

Polyalphaolefin Naphtalenes Alkylbenzenes Polyglycols

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An electric device used to reduce foaming in a crankcase is a ______ A. B. C. D.

Solenoid valve Check valve Crankcase heater All of the above

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The lowest temperature at which an oil can flow is called _______. A. B. C. D.

Viscosity Pour point Viscosity index Lubricity

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The scale factor for hard water used in a condenser with a water velocity of 4 ft/sec is______. A. B. C. D.

0.003 0.005 0.002 None of the above

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As the altitude of a forced air-cooled condenser increases, the surface area of the coil or volume flow rate of the fan must ________.

A. B. C. D.

Increase Decrease Remain the same Vary

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As the water temperature entering a watercooled condenser decreases, the power drawn by the compressor _____ A. B. C. D.

Increases Decreases Will not change Fixed

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Reducing the design temperature difference of an air cooled condenser _______ the amount of heat it can reject to the ambient.

A. B. C. D.

Increases Decreases Will not change Varies

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Reducing the fouling in a water-cooled condenser ______ its rate of heat transfer. A. B. C. D.

Increases Decreases Will not change Varies

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The temperature difference of wastewatercooled condenser is ______ that of recirculated water system. A. B. C. D.

Greater than Equal to Less than Fixed

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The surface area of the tubes in a water-cooled condenser must ______ if the LMTD is less than the design value and the saturated temperature is to remain constant. A. B. C. D.

Be increased Remain the same Be decreased Vary

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The specific heat of air is ______ that of water. A. B. C. D.

Greater than Equal to Less than Proportional

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A measure of the average thermal intensity of the gas and vapor molecules in the atmosphere is the _____. A. B. C. D.

DB temperature WB temperature DP temperature Enthalpy

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A measure of the amount of water vapor that can be absorbed by the atmosphere under its current conditions is called _____. A. B. C. D.

DB temperature WB temperature DP temperature Enthalpy

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The ratio of the current partial pressure of the water vapor in the atmosphere to the saturation pressure of the water vapor at the current DB depression is called_______. A. B. C. D.

DB depression WB temperature DP temperature Relative humidity

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The saturation temperature of the water vapor in the atmosphere is called_______. A. B. C. D.

DB depression WB temperature DP temperature Relative humidity

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Tower fill is not used to increase the_______

A. B. C. D.

Surface area of water Time the water is exposed to the air Velocity of the atmosphere Tower drift

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Chemicals are not added to tower water to reduce___________.

A. B. C. D.

algae foaming Cycles of concentration bacteria

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As the amount of saturated air is drawn back into a tower decreases, the tower approach_______. A. B. C. D.

increases Remains the same decreases varies

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As the amount of scale on the refrigerant tubes of an evaporative condenser increase, the amount of make up water _______. A. B. C. D.

increases Remains the same decreases varies

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As the amount of scale on the refrigerant tubes of an evaporative condenser increase, the refrigeration effect on the system _______. A. B. C. D.

increase Remains the same decreases varies

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As the cycles of concentration in a tower or evaporative condenser increases, the potential for scale formation on hot surfaces ________. A. B. C. D.

increases Remains the same decreases varies

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The ______ can only be effectively employed in industrial processes that have a relatively constant refrigeration load A. B. C. D.

Hand expansion valve Thermal expansion valve Automatic expansion valve Electric expansion valve

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The device used to transfer forces across a sealed boundary is called a _______. A. B. C. D.

seat port needle diagphram

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The device used to minimize the effects of a large pressure drop across the evaporator is called_______. A. B. C. D.

diagphram External equalizer Internal equalizer None of the above

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An externally equalized valve should be used whenever the pressure drop through the evaporator produces a greater than ____ change in the saturation temperature. A. B. C. D.

1.2 degree F 1.2 degree C 1 degree F None of the above

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Which of the following is not considered when determining the pressure drop available for a TXV? A. B. C. D.

distributor Changes in the elevation Refrigerant pressure filters

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As a general rule, the external equalizer connection is made on the suction line approximately _______ beyond the expansion valve’s sensing bulb in the direction of the compressor A. B. C. D.

24 in A or c 60 cm Neither of the above

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Which sensing bulb charge is used in a low and medium temperature applications that do not require pressure limiting characteristics? A. B. C. D.

Liquid cross-charge Gas cross-charge Straight liquid charge Straight gas charge

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As the evaporator temperature of a system using a straight liquid-charged sensing bulb decreases, the superheat of the TXV ________. A. increase B. Remains the same C. decreases D. varies

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The maximum operating pressure of an evaporator can be limited through the use of a _______ sensing bulb.

A. B. C. D.

Liquid cross-charge Gas cross-charge Straight liquid charge Straight gas charge

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