electrical engineering MCQs – Page 365

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 Review each marked answer and report any item that may be outdated or unclear.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
7281. Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?
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A. All of the above

B. Series parallel operation of motors

C. Reduced current method

D. Tap changing control of transformer
7282. If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ?
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A. 0.225

B. 0.26

C. 0.16

D. 0.3

7283. The braking retardation is usually in the range__________________?
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A. 10 to 15 km phps

B. 0.15 to 0.30 km phps

C. 3 to 5 km phps

D. 0.6 to 2.4 km phps

E. 0.30 to 0.6 km phps

7284. For which of the following locomotives the maintenance requirements are the least ?
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A. Steam locomotives

B. Electric locomotives

C. Equal in all of the above

D. Diesel locomotives
7285. Power for lighting in passanger coach, in a long distance electric train, is provided_________________?
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A. through rails

B. through locomotive

C. through individual generator of bogie and batteries

D. directly through overhead electric line

7286. _______________watt-hours per tonne km is usually the specific energy consumption for suburban services?
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A. 5075

B. 1520

C. 120150

D. 160200

7287. Which of the following happens in Kando system ?
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A. Single phase supply is converted into three phase system

B. Three phase A.C. is converted into D.C.

C. None of the above

D. Single phase A.C. is converted into D.C.

7288. The rate of acceleration on suburban orurban service is in the range_________________?
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A. 0.2 to 0.5 km phps

B. 1.6 to 4.0 km phps

C. 15 to 25 km phps

D. 5 to 10 km phps

7289. The coasting retardation is around_________________?
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A. 1.6 km phps

B. 0.16 km phps

C. 16 km phps

D. 40 km phps

7290. Suri transmission is_________________?
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A. hydro-pneumatic

B. mechanical-electrical

C. electrical-pneumatic

D. hydro-mechanical
7291. In case of a steam engine an average coal consumption per km is nearly________________?
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A. 28 to 30 kg

B. 150 to 175 kg

C. 100 to 120 kg

D. 60 to 80 kg

7292. Which of the following D.C. distribution system is the simplest and lowest in first cost ?
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A. Radial system

B. Inter-connected system

C. Ring system

D. None of the above

7293. A conductor, due to sag between two supports, takes the form of____________?
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A. ellipse

B. triangle

C. catenary

D. semi-circle

7294. The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the________________?
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A. none of the above

B. Seeback effect

C. Ferranti effect

D. Raman effect

7295. Galvanised steel wire is generally used as______________?
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A. all of the above

B. stay wire

C. earth wire

D. structural components

7296. Which of the following materials is used for overhead transmission lines ?
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A. Any of the above

B. Cadmium copper

C. Galvanised steel

D. Steel cored aluminium

7297. The use of strain type insulators is made where the conductors are__________?
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A. at intermediate anchor towers

B. any of the above

C. dead ended

D. none of the above

7298. Which of the following bus-bar schemes has the lowest cost?
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A. Ring bus-bar scheme

B. Single bus-bar scheme

C. Main and transfer scheme

D. Breaker and a half scheme

7299. The material generally used for armour of high voltage cables is_____________?
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A. aluminium

B. brass

C. steel

D. copper

7300. Multicore cables generally use________________?
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A. sector-shaped conductors

B. rectangular conductors

C. circular conductors

D. square conductors

E. none of the above