electrical engineering MCQs – Page 161

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 Review each marked answer and report any item that may be outdated or unclear.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

3201. Reluctance motor is a________________?
0

A. low torque variable speed motor

B. variable torque motor

C. self starting type synchronous motor

D. low noise, slow speed motor

3202. For crane travel which of the following motors is normally used ?
0

A. D.C. differentially compound motor

B. Synchronous motor

C. Ward-Leonard controlled D.C. shunt motor

D. AC. slip ring motor

3203. Positive logic in a logic circuit is one in which______________?
0

A. logic 0 and 1 are represented by 0 and positive voltage respectively

B. logic 0 voltage level is higher than logic 1 voltage level

C. logic 0 voltage level is lower than logic 1 voltage level

D. logic 0 and, -1 are represented by negative and positive voltages respectively

3204. Digital computers are more widely used as compared to analog computers, because they are______________?
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A. less expensive

B. easier to maintain

C. always more accurate and faster

D. useful over wider ranges of problem types

3205. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
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A. Braking

B. Starting characteristics

C. Efficiency

D. Running characteristics

3206. A reverse bias pn junction has_____________?
0

A. Almost no current

B. Very narrow depletion layer

C. Large current flow

D. Very low resistance

3207. For faithful amplification by a transistor circuit, the value of VCE should______________for silicon transistor?
0

A. Be 0.2 V

B. None of the above

C. Not fall below 1 V

D. Be zero

3208. What would happen, if smaller logic modules are utilized for performing logical functions associated with FPGA? A. Propagation delay will increase B. FPGA area will increase C. Wastage of logic modules will not be prevented D. Number of interconnected paths in device will decrease ?
0

A. A & D

B. B & C

C. C & D

D. A & B

3209. For faithful amplification by a transistor circuit, the value of VBE should_____________for a silicon transistor?
0

A. Not fall below 0.7 V

B. Be between 0 V and 0.1 V

C. Be zero

D. Be 0.01 V

3210. Locomotive having monomotor bogies________________?
0

A. has better coefficient of adhesion

B. are suited both for passanger as well as freight service

C. has better riding qualities due to the reduction of lateral forces

D. has all above qualities

3211. Which mechanism allocates the binary value to the states in order to reduce the cost of the combinational circuits ?
0

A. State Evaluation

B. State Assignment

C. State Minimization

D. State Reduction

3212. In an intrinsic semiconductor, the number of free electrons_____________?
0

A. None of the above

B. Is greater than the number of holes

C. Equals the number of holes

D. Is less than the number of holes

3213. For which of the following locomotives the maintenance requirements are the least ?
0

A. Diesel locomotives

B. Equal in all of the above

C. Electric locomotives

D. Steam locomotives

3214. The cost of an induction motor will increase as________________?
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A. horsepower rating decreases but r.p.m. increases

B. horsepower rating and operating speed increases

C. horsepower rating increases but r.p.m. decreases

D. horsepower rating and operating speed decreases

3215. The number of Boolean functions that can be generated by n variables is equal to_________________?
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A. 2n

B. 2n

C. 2n-1

D. 22 n

3216. Vacuum is created by which of the following ?
0

A. Ejector

B. None of the above

C. Any of the above

D. Vacuum pump

3217. The friction at the track is proportional to________________?
0

A. speed

B. 1/speed

C. l/(speed)2

D. none of the above

3218. The universal gate is ________________?
0

A. OR gate

B. None of the above

C. NAND gate

D. AND gate

3219. A pony motor is used for the starting which of the following motors ?
0

A. Squirel cage induction motor

B. None of the above

C. Schrage motor

D. Synchronous motor

3220. In series motor which of the following methods can be used for changing the flux per pole ?
0

A. Diverter field control

B. Series-parallel control

C. Any of the above

D. Tapped field control

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