electrical engineering MCQs – Page 364

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 Review each marked answer and report any item that may be outdated or unclear.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
7261. In tramways which of the following motors is used ?
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A. A.C. three phase motor

B. D.C. series motor

C. D.C. shunt motor

D. AC. single phase capacitor start motor

7262. _______________method can bring the locomotive to dead stop?
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A. Plugging braking

B. None of the above

C. Rheostatic braking

D. Regenerative braking

7263. Automatic signalling is used for which of the following trains ?
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A. Mail and express trains

B. Superfast trains

C. All trains

D. Suburban and Urban electric trains

7264. In a steam locomotive electric power is provided through_____________?
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A. diesel engine generator

B. overhead wire

C. battery system

D. small turbo-generator
7265. The speed of a superfast train is______________?
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A. more than 100 kmph

B. 75 kmph

C. 60 kmph

D. 100 kmph

7266. The horsepower of steam locomotives is______________?
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A. 1500 to 2000

B. 3000 to 4000

C. up to 1500

D. 2000 to 3000

7267. The efficiency of diesel locomotives is nearly_______________?
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A. 20 to 25 percent

B. 30 to 40 percent

C. 45 to 55 percent

D. 60 to 70 percent

7268. Overhead lines for power supply to tramcars are at a minimum height of______________?
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A. 3 m

B. 6 m

C. 10 m

D. 15 m

7269. have maximum unbalanced forces_______________?
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A. Electric locomotives

B. Diesel shunters

C. Steam locomotives

D. Diesel locomotives

7270. In main line service as compared to urban and suburban service______________?
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A. all of the above

B. distance between the stops is more

C. acceleration and retardation rates are low

D. maximum speed reached is high

7271. ________________ frequency is not common in low frequency traction system?
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A. 16 Hz

B. 40 Hz

C. 25 Hz

D. non of these

7272. The overall efficiency of steam locomotive is around_____________?
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A. 5 to 10 percent

B. 35 to 45 percent

C. 25 to 35 percent

D. 15 to 20 percent

7273. Which of the following braking systems is used on steam locomotives ?
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A. Vacuum system

B. Hydraulic system

C. Pneumatic system

D. None of the above

7274. Due to which of the following co-efficient of adhesion improves ?
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A. All of the above

B. Dust on the rails

C. Rust on the rails

D. Sand on the rails

7275. The specific energy consumption of a train depends on which of the following ?
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A. Gradient

B. All of the above

C. e covered

D. Acceleration and retardation

7276. _________ locomotive has the highest operational availability?
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A. Steam

B. Electric

C. Diesel

7277. Co-efficient of adhesion is________________-?
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A. high in case of D.C. traction than in the case of AC. traction

B. low in case of D.C. traction than in the case of AC. traction

C. equal in both AC. and D.C. traction

D. any of the above

7278. The air resistance to the movement of the train is proportional to_____________?
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A. (speed)

B. speed

C. 1/speed

D. (speed)
7279. Vacuum is created by which of the following ?
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A. Ejector

B. Any of the above

C. Vacuum pump

D. None of the above

7280. Long distance railways use which of the following ?
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A. 25 kV three phase A.C.

B. 25 kV single phase A.C.

C. 25 kV two phase A.C.

D. 200 V D.C.