electrical engineering MCQs – Page 163

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 Review each marked answer and report any item that may be outdated or unclear.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
3241. In which of the following applications the load on motor changes in cyclic order ?
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A. All of the above

B. Rolling mills

C. Cranes

D. Electric shovels

3242. Suri transmission is_________________?
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A. mechanical-electrical

B. hydro-pneumatic

C. hydro-mechanical

D. electrical-pneumatic

3243. In a steam locomotive electric power is provided through_____________?
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A. diesel engine generator

B. small turbo-generator

C. overhead wire

D. battery system

3244. The capacity of a crane is expressed in terms of_______________?
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A. any of the above

B. type of drive

C. tonnes

D. span

3245. A pentavalent impurity has______________Valence electrons?
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A. 4

B. 3

C. 5

D. 6

3246. The random motion of holes and free electrons due to thermal agitation is called______________?
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A. Ionisation

B. Pressure

C. Diffusion

D. None of the above

3247. Which part of a motor needs maximum attention for maintenance ?
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A. Rearing

B. Rotor winding

C. Stator winding

D. Frame

3248. The value of VBE ___________________?
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A. Is almost independent of IC

B. Depends upon IC to moderate extent

C. None of the above

D. Is strongly dependant on IC

3249. Tractive effort is required to_____________?
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A. overcome friction, windage and curve resistance

B. do all of the above

C. accelerate the train mass

D. overcome the gravity component of train mass

3250. (1(10101)2 is_______________?
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A. ( 69)10

B. (5)10

C. (37)10

D. (41 )10

3251. Energy consumption in propelling the train is required for which of the following?
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A. Work against the resistance to motion

B. Acceleration

C. All of the above

D. Work against gravity while moving up the gradient

3252. need frequent starting and stopping of electric motors ?
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A. Grinding mills

B. Lifts and hoists

C. Air-conditioners

D. Paper mills

3253. Which of the following motors is preferred when smooth and precise speed control over a wide range is desired ?
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A. Wound rotor induction motor

B. Squirrel cage induction motor

C. D.C. motor

D. Synchronous motor

3254. A semiconductor has generally_______________valence electrons?
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A. 4

B. 2

C. 6

D. 3

3255. Class _____________ operation gives the maximum distortion?
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A. C

B. AB

C. A

D. B

3256. In the design of a biasing circuit, the value of collector load RC is determined by__________________?
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A. None of the above

B. VCE consideration

C. VBE consideration

D. IB consideration

3257. In the above question (Q38.) , what is the collector voltage ?
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A. 6 V

B. 7 V

C. 3 V

D. 8 V

3258. The leakage current in a silicon transistor is about_____________ the leakage current in a germanium transistor?
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A. One hundredth

B. One tenth

C. One thousandth

D. One millionth

3259. Rotor of a motor is usually supported on ___________________ bearings?
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A. bush

B. thrust

C. needle

D. ball or roller
3260. The starting torque of a D.C. motor is independent of which of the following?
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A. Armature current

B. Flux and armature current

C. Speed

D. Flux