electrical engineering MCQs – Page 166

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 Review each marked answer and report any item that may be outdated or unclear.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 generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
3301. Automatic signalling is used for which of the following trains ?
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A. Suburban and Urban electric trains

B. Superfast trains

C. Mail and express trains

D. All trains

3302. Specific energy consumption is affected by which of the following factors ?
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A. Retardation and acceleration values

B. All of the above

C. Distance between stops

D. Gradient

3303. Which of the following braking systems on the locomotives is costly ?
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A. Vacuum braking on steam locomotives

B. Regenerative braking on electric locomotives

C. Vacuum braking on diesel locomotives

D. All braking systems are equally costly

3304. Which of the following motors is preferred when quick speed reversal is the main consideration ?
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A. D.C. motor

B. Wound rotor induction motor

C. Synchronous motor

D. Squirrel cage induction motor

3305. In tramways which of the following motors is used ?
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A. D.C. series motor

B. D.C. shunt motor

C. A.C. three phase motor

D. AC. single phase capacitor start motor

3306. Battery operated trucks are used in________________?
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A. steel mills

B. narrow gauge traction

C. factories for material transportation

D. power stations

3307. In which of the following base systems is 123 not a valid number ?
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A. Base 16

B. Base 3

C. Base8

D. Base 10

3308. If biasing is not done in an amplifier circuit, it results in________________?
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A. Unfaithful amplification

B. Excessive collector bias

C. Decrease in the base current

D. None of the above

3309. ___________________is preferred for synthetic fibre mills?
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A. Series motor

B. Shunt motor

C. Synchronous motor

D. Reluctance motor
3310. Battery operated scooter for braking uses__________________?
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A. plugging

B. rheostatic braking

C. mechanical braking

D. regenerative braking

3311. Co-efficient of adhesion reduces due to the presence of which of the following ?
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A. Sand on rails

B. Dew on rails

C. Oil on the rails

D. both B. and C.
3312. The point of intersection of d.c. and a.c. load lines represents __________________?
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A. None of the above

B. Voltage gain

C. Current gain

D. Operating point
3313. The leakage current across a pn junction is due to________________?
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A. Minority carriers

B. Junction capacitance

C. None of the above

D. Majority carriers

3314. For a particular application the type of electric-and control gear are determined by which of the following considerations ?
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A. Starting torque

B. Speed control range and its nature

C. Limitation on starting current

D. Conditions of environment

E. All of the above
3315. The most commonly used semiconductor is________________?
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A. Carbon

B. Sulphur

C. Germanium

D. Silicon
3316. The specific energy consumption of a train depends on which of the following ?
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A. e covered

B. All of the above

C. Acceleration and retardation

D. Gradient

3317. The circuit that provides the best stabilization of operating point is___________________?
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A. Collector feedback bias

B. None of the above

C. Potential divider bias

D. Base resistor bias

3318. Which is the correct order of sequence for representing the input values in K-map ?
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A. (00, 10, 01, 11)

B. (00, 10, 11, 01)

C. (00, 01, 10, 11)

D. (00, 01, 11, 10)

3319. Most of the digital computers do not have floating point hardware because_____________?
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A. of no specific reason.

B. it is not possible to perform floating point addition by hardware

C. floating point hardware is costly

D. it is slower than software

3320. The binary code of (21.125)10 is_______________?
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A. 10101.001

B. 10100.111

C. 10101.01

D. 10100.001