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Rony Parvej’s EEE Question Bank DPDC-2014, BUET Recruitment Test Question of Dhaka Power Distribution Company (DPDC) Compiled by: Rony Parvej (IUT, EEE‟07) Post: Assistant Engineer (Electrical) Time: 90 minutes Full Marks: 100 Exam Date: 07.11.2014 Venue: BUET [ পরীায় মমাট ছি ১০৪ টা। নন-ছিপাটটমমটা MCQ ৬০টা (০ মাটস), ছিপাটটমমটা MCQ টা (মাটস), ছিপাটটমমটা ছরমটন ১টা (মাটস)। মা ৯০ ছমছনমট এতমা মর উর মেবার পর সবমা মন রাখা ছনসমেমহ খব ছিন াজ। কয়েকজয়নয য়মোগীতোে ময টা যতট মন আমি মভাব ছি মরমখ ছনমজর ভাষায় মসমা এখামন তম মেয়ার মো রাম ] MCQ ( Non-Departmental) 60 x 1/2 =30 1. Free market is (a) a condition in the international market where nations do not impose customs duty or other taxes on import of goods (b) market where the price of a commodity is determined by free play of the forces of supply and demand (c) ports that are exempted from payment of customs duty on articles of commerce, primarily to encourage tourism (d) None of the above 2. For which of the following disciplines is Nobel Prize awarded? (a) Physics and Chemistry (b) Physiology or Medicine (c) Literature, Peace and Economics (d) All of the above 3. Chrometophobia is the fear of (a) height (b) money (c) chromium (d) clock 4. The Homolographic projection has the correct representation of (a) shape (b) area (c) baring (d) distance 5. 'Citius, Altius, Fortius' slogan is the motto of which organization ? (a) Olympic (b) Oscar (c) Microsoft (d) Diners' club 6. The first lady Prime Minister of a country was (a) Srimavo Bhadaranaike (b) Maria Estate Pew (c) Junko Taibei (d) None of the above 7. The gas usually filled in the electric bulb is (a) Nitrogen (b) Hydrogen (c) carbon dioxide (d) oxygen 8. Galvanised iron sheets have a coating of (a) lead (b) chromium (c) zinc (d) tin 9. Which material is used for cooling of nuclear power plant? (a) Water (b) Graphite (c) (d) 10 . The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? (a) 1/6 (b) 1/3 (c) 1/8 (d) 1/4 11. The audible frequency range for human is (a) 20Hz 20,000 Hz (b) (c) (d)

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  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    Recruitment Test Question of Dhaka Power Distribution Company (DPDC) Compiled by: Rony Parvej (IUT, EEE07) Post: Assistant Engineer (Electrical)

    Time: 90 minutes Full Marks: 100

    Exam Date: 07.11.2014 Venue: BUET [ - MCQ ( ), MCQ (), ( ) ]

    MCQ ( Non-Departmental) 60 x 1/2 =30

    1. Free market is

    (a) a condition in the international market where nations do not impose customs duty or other

    taxes on import of goods

    (b) market where the price of a commodity is determined by free play of the forces of supply

    and demand

    (c) ports that are exempted from payment of customs duty on articles of commerce, primarily to

    encourage tourism

    (d) None of the above

    2. For which of the following disciplines is Nobel Prize awarded?

    (a) Physics and Chemistry (b) Physiology or Medicine

    (c) Literature, Peace and Economics (d) All of the above

    3. Chrometophobia is the fear of

    (a) height (b) money (c) chromium (d) clock

    4. The Homolographic projection has the correct representation of

    (a) shape (b) area (c) baring (d) distance 5. 'Citius, Altius, Fortius' slogan is the motto of which organization ?

    (a) Olympic (b) Oscar (c) Microsoft (d) Diners' club

    6. The first lady Prime Minister of a country was

    (a) Srimavo Bhadaranaike (b) Maria Estate Pew

    (c) Junko Taibei (d) None of the above 7. The gas usually filled in the electric bulb is

    (a) Nitrogen (b) Hydrogen (c) carbon dioxide (d) oxygen

    8. Galvanised iron sheets have a coating of

    (a) lead (b) chromium (c) zinc (d) tin

    9. Which material is used for cooling of nuclear power plant? (a) Water (b) Graphite (c) (d)

    10 . The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of

    the isotope will be left behind?

    (a) 1/6 (b) 1/3 (c) 1/8 (d) 1/4

    11. The audible frequency range for human is (a) 20Hz 20,000 Hz (b) (c) (d)

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    12-15.

    16. ? (a) (b) (c) (d)

    17. ? (a) (b) (c) (d)

    18. ? (a) (b) (c) (d)

    19. ? (a) (b) (c) (d)

    20. ? (a) (b) (c) (d)

    21. ? (a) (b) (c) (d)

    22. ? (a) + (b) (c) (d)

    23. ? (a) (b) (c) (d)

    24. (a) (b) (c) (d)

    25. ? (a) (b) (c) (d)

    26. ? (a) (b) (c) (d)

    27. ? (a) (b) (c) (d)

    28. ? (a) (b) (c) (d)

    29. ? (a) (b) (c) (d)

    30. ? (a) + (b) (c) (d)

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET 31. Who is the writer of Romeo Juliet? (a) O Henry (b) William Shakespeare (c) (d)

    32. Who is the writer of Daffodils? (a) O Henry (b) Willium Wordsworth (c) (d)

    33. What is the synonym of Limpid (a) (b) (c) (d)

    34. Disease spread by atmosphere ..... (a) epidemic (b) Infectious (c) Contagious (d)

    35. What is the synonym of (a) (b) (c) (d)

    36. What is the antonym of Ambivalent? (a) (b) (c) (d)

    37. What is the antonym of Desiccated? (a) (b) (c) (d)

    38. What is the antonym of Courteous? (a) (b) (c) (d)

    39. Find the missing word: We emphasized their coming. (a) (b) (c) (d)

    40. What is the plural of hypothesis? (a) Hypotheses (b) Hypothesises (c) Hypothesus (d)

    41. They were --- late by severe traffic Jam. (a) Caught down (b) Made (c) (d)

    42. I wish if I ---- there, I would have been done the so. (a) was (b) were (c) would have (d)

    43. I Just the news. (a) heard (b) have heard (c) (d)

    44. Persons who eats human flesh and animals that eats its own kind is called (a) cannibal

    (b) flesh eater

    (c) meat eater

    (d) non vegetarian

    45.

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET 46. Which side is open of parabola x+8y

    2 =5.

    (a) Left (b) Right (c) Up (d) Down

    47. The probability of happening A is ---, the probability of happening B is ---, The probability that A

    and B both will happen is ----. What is the probability that A will happen if B happens? (a) (b) (c) (d)

    48. The first box contains big chocolates and --- small chocolates. The 1st box weights pound. The

    second box contains --- small chocolates and --- big chocolates. The second box weights --- pound. The

    weight of the boxes are not included in these counts. What is the weight of a small chocolate? (a) (b) (c) (d)

    49. log 2 n + log 2 6 - log 2 3 = 1. What is the value of n? (a) 1/3 (b) (c) (d)

    50-52.

    53. How many arrow keys usually a standard keyboard has? (a) Four (b) Five

    (c) (d)

    54. If we write something in Microsoft Word that is temporarily stored in (a) EEPROM (b) ROM

    (c) RAM (d)

    55. In Microsoft Excel we can know the location of a column by (a) Status bar (b) Formula bar (c) (d)

    56. The Smallest unit of computer memory is (a) byte (b) bit

    (c) bit/s (d)

    57. If we want to start a new paragraph in Microsoft Word then which command is used? (a) Enter (b) Ctrl + Enter (c) (d)

    58. If We want to undo anything in Microsoft Word then which command is used? (a) Ctrl + Z (b) (c) (d)

    59. .mpg is the extension of (a) a video (b) an image (c) (d)

    60. (a) (b) (c) (d)

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET 1. MCQ (Departmental) 28x 1 =28

    1. The following parameter of an AC signal can be varied by an oscilloscope (a) Amplitude (b) Frequency

    (c) both (a) and (b) (d) none of the above

    2. Which of the following statement is false? (a) At maximum power transfer condition, the voltage regulation is 100%

    (b) At maximum power transfer condition, the efficiency is 100%

    (c) At maximum power transfer condition, the loss is 50%

    3. Which of the following statement is true at series resonance condition? (a) Current is minimum (b) p.f. is lagging

    (c) p.f. is unity (d) p.f. is leading

    4. Parallel resonance can be obtained by (a) varying resistance in capacitive or inductive brunch

    (b) varying an inductance

    (c) both (a) and (b)

    (d) none of the above

    5. For Si, diffused impurities with how many valence electrons are called donor atoms? (a) 2 (b) 3

    (c) 5 (d) 6

    6. For which kind of amplification can the active region of the common emitter configuration be used? (a) Voltage (b) Current

    (c) Power (d) All the above

    7. The power dissipation of a Si diode having ID = 40 mA would be (a) 18 mW (b) 28 W

    (c) 280 mW (d) Undefined

    8. In which region are both the collector-base and base-emitter junctions are forward biased? (a) Active (b) Cut-off

    (c) Saturation (d) All of the above

    9. Which of the following device has the highest input Impedance? (a) Diode (b) JFET

    (c) MOSFET (d) Bipolar Junction Transistor

    10. Which of the following is required for oscillation? (a) A 1

    (b) The phase shift around the feedback network must be 180 o

    (c) Both (a) and (b)

    (d) None of the above

    11. An over current relay having a current setting of 125% is connected to a supply circuit through a

    CT 400/5. What would be the pickup current?

    (a) 5A (b) 6.25A

    (c) 4A (d) 3.5A

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    12. If base KVA is doubled, then impedance in p.u. will be (a) doubled (b) halved

    (c) 4 times

    13. In load flow analysis PQ bus is defined as the bus that (a) has only fixed load connected to it

    (b) has both load an generator connected

    (c) Consumes power and generates VAR

    14. A synchronous generator at under-excited condition, operates at (a) lagging (b) unity

    (c) leading

    15. The armature resistance variation method of speed control of shunt dc motor is used to (a) raise the speed above the base speed

    (b) lower the speed bellow the base speed

    (c) for both the above purposes

    16. What could cause voltage build-up occur in a shunt dc generator during starting to fail. (a) Lack of residual flux in the field core.

    (b) Wrong connection of the field coil.

    (c) Field resistance is higher than critical resistance

    (d) All of the above.

    17. In how many ways the speed of dc shunt motor can be varied? (a) 2 (b) 3

    (c) 4 (d) One

    18. Practically in open circuit test of a transformer, the wattmeter measures (a) Copper loss (b) Core loss

    (c) A slight copper loss (d) both (b) & (c)

    19. What is the SNR (in dB) of a voice channel if the signal power level is 0.52 mW and noise level is

    0.01 mW? (a) 52 dB (b) 34.32 dB

    (c) 17.16 dB (d)

    20. What is the voltage at secondary side of a transformer having a turn ratio of 1:10 if 440V dc is

    applied at primary? (a) 0 V (b) 4400 V

    (c) 44 V (d) 4.4 V

    21. The main reason for the superiority of digital communication over analog communication is

    (a) The use of simple electronic circuitry.

    (b) The use of amplifiers periodically

    (c) The use of regenerative repeaters

    (d) The use of A/D and D/A converters

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET 22. The signal x(t) = 2 sin ( 500 t ) + 3 sin ( 1400 t ) + 2 sin ( 3400 t ) + 2 sin ( 6900 t ) has been

    band limited within (300-3400 Hz). If this signal is sampled at Nyquist rate, what will be output data

    rate if this signal is encoded with a 512 level uniform quantization.

    (a) 72 kb/s

    (b) 61.2kb/s

    (c) 55.8 kb/s

    (d) 68.1 kb/s

    23. why is parallel transmission more useful than serial transmission? (a) For long distance data transmission

    (b) For short distance data transmission

    (c) For synchronous transmission

    (d) For Asynchronous transmission

    24. Envelop detector is helpful for which of the following modulation? ( ) (a) ASK

    (b) ASK and FSK

    (c) FSK

    (d) PSK

    25. Which equation has amplitude 1, duration 2, point 0 and ?

    (a) sint

    (b) sin2 t+1

    (c) 1+sin2t (d)

    26. In short circuit test of a transformer in which side supply voltage is applied? (a) Low voltage side

    (b) High voltage side

    (c)

    (d)

    27-28.

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    Written ( Departmental) 3 x 14 =42

    2. Determine Req and I in the circuit shown bellow:

    3. For the circuit shown bellow, Let VC (0) = 45V. Determine VC (t) and VX (t) at t > 0.

    4. 3-phase line voltages of 2300 volts magnitude are impressed on a balanced wye connected load

    which consists of 100 resistance per phase in series with 173.2 inductive reactance per phase. Find

    the line current and the total power taken by the 3-phase load.

    5. Determine the minimum value of IB that will produce saturation. (In saturation VCE 0.2 V)

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    6. Draw the ac small signal equivalent circuit of the following MOSFET configuration.

    6. Calculate the Output VO of the following circuit:

    7. Draw layout diagram of a substation having double bus-bar with single circuit breaker for each

    circuit.

    8. Show that, the generalized circuit constants of the short transmission line model satisfy the condition

    AD - BC =1.

    9. Write Down the power angle equation for a pure reactance network. Point out a change in which

    network element would affect the system satiability.

    10. An alternator is supplying a load of 500KVA at 0.6 power factor. If the power factor is raised to

    unity, how many more KW can the alternator supply for the same KVA loading?

    11. What conditions are required in paralleling two alternators? Draw three-light-bulb method for

    checking phase sequence. What else method can check this?

    12. Draw an auto-transformer starter for a 3-phase induction motor and mention the starting sequence.

  • Rony Parvejs EEE Question Bank DPDC-2014, BUET

    13. A PCM-TDM system multiplexes 10 band limited voice channel (300-3400 KHz) and uses a 256

    level quantizer. If the signal is sampled at a rate 17 % higher than Nyquist rate, then what will be the

    maximum energy bandwidth of the transmission channel?

    14. The spectrum of a modulating signal is shown in the figure. Draw the spectrum of DSB-SC,

    SSB+C, and VSB modulated signals for this modulating signal assuming a carrier signal of

    C (t) = AC Cos 2 fC t

    ------------------------------ 0 -----------------------------------

    (AUST) Shanto Das (DUET) Arfin Khan Rafi Sabah Tasneem (BUET) Ayan Khan (AUST) Md Zobaer Islam (BUET)

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