electrical engineering MCQs – Page 162

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs

1. economics of power generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

3221. When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on_________________?
0

A. None of the above

B. Majority carriers

C. Junction capacitance

D. Minority carriers

3222. A debouncing circuit is________________?
0

A. a monostable MV

B. a latch

C. an astable MV

D. a bistable MV

3223. In case of locomotives the tractive power is provided by______________?
0

A. single stage steam turbine

B. single cylinder double acting steam engine

C. double cylinder, single acting steam engine

D. double cylinder, double acting steam engine

3224. Speed-time curve of main line service differs from those of urban and suburban services on following account_______________?
0

A. it has longer coasting period

B. accelerating and braking periods are comparatively smaller

C. it has longer free running period

D. all of the above

3225. ___________________is not a part of ball bearing ?
0

A. Outer race

B. Inner race

C. Cage

D. Bush

3226. The stability factor of a collector feedback bias circuit is_______________ that of base resistor bias?
0

A. Less than

B. The same as

C. None of the above

D. More than

3227. Power for lighting in passanger coach, in a long distance electric train, is provided_________________?
0

A. through individual generator of bogie and batteries

B. directly through overhead electric line

C. through rails

D. through locomotive

3228. have maximum unbalanced forces_______________?
0

A. Diesel locomotives

B. Electric locomotives

C. Diesel shunters

D. Steam locomotives

3229. The resistivity of pure germanium under standard conditions is about_______________?
0

A. 3 x 106 cm

B. 6 x 10-4 cm

C. 60 x cm

D. 6 x 104 cm

3230. At room temperature, an intrinsic semiconductor has_______________?
0

A. Many holes only

B. Many free electrons only

C. A few free electrons and holes

D. No holes or free electrons

3231. In a paper mill where constant speed is required________________?
0

A. A.C. motors are preferred

B. synchronous motors are preferred

C. group drive is preferred

D. individual drive is preferred

3232. Which of the following machines has heavy fluctuation of load ?
0

A. Planer

B. g machine

C. Lathe

D. Punching machine

3233. For proper amplification by a transistor circuit, the operating point should be located at the_____________ of the d.c. load line?
0

A. None of the above

B. Middle

C. The maximum current point

D. The end point

3234. The value of co-efficient of adhesion will be high when rails are_________________?
0

A. cleaned with sand

B. wet

C. greased

D. sprayed with oil

3235. While selecting motor for an air conditioner which of the following characteristics is of great importance ?
0

A. Noise

B. None of the above

C. Type of enclosure

D. Type of bearings

E. Arrangement for power transmission

3236. Indicate which of the following three binary additions are correct? 1.1011 + 1010 = 10101 II. 1010 + 1101 = 10111 ?
0

A. II and III

B. . 1010 + 1101 = 11111

C. I and II

D. III only

E. II and III

3237. When a pure semiconductor is heated, its resistance_________________?
0

A. Cant say

B. Goes up

C. Remains the same

D. Goes down

3238. Which type of CPLD packaging can provide maximum number of pins on the package due to small size of the pins ?
0

A. BGA

B. PLCC

C. PGA

D. QFP

3239. The NAND gate is AND gate followed by_________________?
0

A. None of the above

B. AND gate

C. OR gate

D. NOT gate

3240. Series motor is not suited for traction duty due to which of the following account ?
0

A. Self relieving property

B. Less current drain on the heavy load torque

C. Commutating property at heavy load

D. Current surges after temporary switching off supply

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