Pgcb Question Buet 2014

Recruitment Test Question of Power Grid Company of Bangladesh (PGCB) Compiled by: Rony Parvej (IUT, EEE’07) Post: Assistant Engineer (Electrical) Time: 90 minutes Exam Date: 31.01.2014

Full Marks: 100 Venue: BUET

[ পরীক্ষায় মমাট প্রশ্ন ছি঱ ৯৯ টা। নন-ছিপাটটমমন্টা঱ MC Q ৬০টা (৩০ মার্টস), ছিপাটটমমন্টা঱ MC Q ২৫ টা (২৫ মার্টস), ছিপাটটমমন্টা঱ ছরমটন প্রশ্ন ১৪ টা ( ১৩ টায় ৩ মার্টস র্মর এবং ১ টায় ৬ মার্টস অর্টাৎ মমাট ৪৫ মার্টমসর)। মাত্র ৯০ ছমছনমট এতগুম঱া প্রমশ্নর উত্তর মেবার পর সবগুম঱া প্রশ্ন মমন রাখা ছনিঃসমেমহ খুব র্ছিন র্াজ। ময র্টা প্রশ্ন যতটুর্ু মমন আমি মূ঱ভাব ছির্ মরমখ ছনমজর ভাষায় মসগুম঱া এখামন তুম঱ মেয়ার মেষ্টা র্র঱াম ]

MCQ ( Non-Departmental) 60 x 0.5 =30 1. Which Country has largest boarder area with India? (a) Bangladesh (b) China (c) Nepal (d) Pakistan 2. ELORA is situated in which country? (a) India (b) Egypt (c) (d) 3. When Musa Ebrahim Conquered Everest? (a) 2010 (b) 2009 (c) 2011 (d) 2012 4. How many one day internationals sachin tendulker has played? (a) 200 (b) 463 (c) (d) 5. Which type of extinguisher is used to extinguish the fire of petroleum? (a) Liquid (b) powder (c) gas (d) 6. Which one is Leap Year? (a) 2000 (b) 1900 (c) 2012 (d) None of these 7. Who introduced Bangla year? (a) Samrat Akbar (b) (c) (d) 8. Victoria Fall is situated in which country? (a) Canada (b) USA (c) South Africa (d) UK 9. Winston Charchil was prime minister of which country? (a) USA (b) UK (c) (d) 10. ‘The last supper’ was painted by(a) Michel Angelo (b) Leonardo da Vinci (c) Pablo Picasso (d) 11. Who is the architect of ‘Aparajeyo Bangla’ situated at Dhaka Univrsity? (a) Syed Abdullah Khaled (b) Hamidur Rahman (c) (d) 12. eV is unit of – (a) Energy (b) Power (c) Charge (d) 13. Fundamental frequency of 480 Hz sonometer is14. Sonometer harmonics related 15. The operation of 26 March , 1971 is called as(a) Operation Search Light (b) (c) (d) 16. Life outside the world (outer space) is discussed in – (a) Neology (b) Extrology (c) (d) 17. For the presence of which material in air the color of …. Is discoloured? (a) Oxygen (b) (c) (d) 18. Which material is used to make amalgam(a) Mercury (b) (c) (d) 19. In which district Bangladesh has boarder with India and Myanmar both? (a) Rangamati (b) Coxbazar (c) Khagrachori (d) Bandarban 20. Olympic 2016 will be held in(a) Beijing (b) London (c) Brazil (d) 21. Which one is faster memory? (a) Cache (b) RAM (c) Hard disk (d)

22. Which one of following is not an operating system? (a) Linux (b) Java (c) Ubuntu (d) Android 23. Which one of the following is not a valid file format? (a) .xsl (b) .doc (c) .docx (d) .xls 24. Latest Clock speed of processor is measured in(a) GHz (b) MHz (c) Gigabyte (d) 25. What is LAN? (a) Local Area Network (b) (c) (d) 26. What is the binary form of 14? (a) 1100 (b) 1010 (c) (d) 27. Which one is Database management software? (a) Microsoft Access (b) Microsoft Excel (c) Microsoft Word (d) Microsoft Powerpoint 28. Who described blood circulation process properly? (a) William Harve (b) (c) (d) 29. If Moment of inertia is constant and speed is doubled the torque angle (a) remains unchanged (b) is doubled (c) (d) 30. If x:y = 3:4 and y:z = 8: 10 then x:y:z = (a) 6:8:10 (b) (c) (d) 31. What is the 7th and 8th term of the sequence: 1, 3, 6, 10, 15, 21, (a) 28 and 35 (b) 36 and 48 (c) (d) 32. if 3x-y=4 and x+5y=28 then what are the values of x and y? (a) x=3 and y=5 (b) (c) (d) 33. A bus starts travelling at 80 Km/hr speed to a destination. Another bus starts travelling at 120 Km/hr speed to the same destination from the same place. After how much time the second bus will meet the first bus? (a) 1 hour and 30 minutes (b) (c) (d) 34. A person makes 5% profit of 1800 taka and 10% profit of 10000 taka. What is his average profit? (a) 9.23% (b) (c) (d) 35. A bus of 1000Kg travelling at a speed of 10 meter per second is rested in 10 seconds. How much force is required for that? (a) 1000 N (b) (c) (d) 36. Gun Metal is the mixture of – (a) Brush and copper (b) (c) (d) 37. Paper is made ---- wood. (a) of (b) from (c) (d) 38. The synonym of ‘Resentment’ is(a) anger (b) fear (c) (d) rearrange 39. In the word ‘Bull market’ what is meant by ‘bull’? (a) rising (b) (c) (d) 40. As the sun -----, I was doing the work. (a) was shining (b) shine (c) (d) 41. Which one is correct? (a) Why have not you done this? (b) Why not have you done this ? (c) Why did not you done this? (d) 42. We will reach there ----- five minutes. (a) within (b) by (c) (d) 43. run …. by (ভুম঱ মেছি  ) (a) out (b) away (c) (d)

MCQ ( Departmental) 25 x 1 =25 1. In ‘UNIT’ transformer is used as (a) Energy meter (b) (c) (d) 2. Current in parallel resonant circuit is – (a) maximum (b) minimum (c) (d) none of these 3. At noise which diode is better between Si and Ge(a) Si (b) Ge (c) (d) 4. Which one is used in solar photovoltaic – (a) PN junction (b) Electromechanical device (c) Quantum device (d) 5. At zero degree celcius temperature Intrinsic Si material behaves like – (a) metal (b) insulator (c) (d)None of these 6. In Dc machine, field is connected with(a) rotor (b) armature (c) (d) 7. In open circuit test of transformer power supply is given in (a) low voltage side (b) high voltage side (c) (d) 8. By field control we can only obtain speed – (a) higher than normal speed (b) lower than normal speed. (c) (d) 9. If Shunt resistance is increased in motor, then speed will (a) increase (b) decrease (c) (d) 10. In ∆Yg phase difference between ∆ ang Y is (a) 0º (b) 30º (c) 60º (d) 90º 11. Synchronous condenser is used in – (a) Under excited DC (b) Under excited AC (c) Overexcited AC (d) 12. If load is increased then terminal voltage of a battery will (a) remain same (b) increased (c) decreased (d) 13. The main superiority of digital communication over analog communication is (a) electronic circuit can be used (b) A/D and D/A converter can be used (c) (d) 14. A PCM system multiplexes 10 band limited voice channel (300-3400 Hz) and uses a 256 level quantizer, considering the standard sampling rate for telephone system the bandwidth of binary encoded signal is(a) 640 Kb/s (b) 80 Kb/s (c) 248 Kb/s (d) 496 Kb/s 15.

Written ( Departmental) 1. Find I1 and I2 of the following circuit.

13 x 3 + 6 =45

2. Convert the star network to delta:

3. Show the direction of the current in primary and polarity of the load initially:

4. A motor has copper loss of 300 W and 4.5% slip. How much electrical power is converted to mechanical power? 5. Draw the structure of an optical fibre and write the name of different components of optical fiber communication. 6. In a resonant RLC circuit R=10Ω , XL=200Ω , f = 50 Hz. If 100 V voltage is applied what will be the voltage drop across capacitor? 7. What are the no load and full load losses of transformer? 8. Draw the diagram of a Dc motor starter. 9. Find the value of R in the following circuit:

10. For maximum frequency B draw the frequency spectrum of DSB-SC and SSB. 11. A 3-phase delta connected R-L load has line voltage of 400V. In each phase R=10Ω and XL=j10Ω. Find line current and total power of the circuit. 12. Convert 0.25 p.u. reactance of 500MVA, 18 KV to new p.u. reactance having new bases of 100 MVA and 18 KV. 13. Maximum efficiency of a transformer is 98%. It runs at 50% efficiency for 14 hours and at no load for remaining 10 hours. Find it’s all day efficiency. 14. LLL-G fault related problem. (6 marks)