electrical engineering MCQs – Page 315

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 Review each marked answer and report any item that may be outdated or unclear.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
6281. For which of the following applications motor has to start with high acceleration ?
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A. Centrifugal pump

B. Oil expeller

C. Lifts and hoists

D. Floor mill

6282. Which of the following is essentially needed while selecting a motor ?
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A. Foundation pedal

B. Bearings

C. Pulley

D. Starter
6283. Flame proof motors are used in_________________?
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A. steel mills

B. explosive atmospheres

C. moist atmospheres

D. paper mills

6284. In jaw crushers a motor has to often start against ____________________ load?
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A. heavy

B. normal

C. low

D. medium

6285. Which of the following motors always starts on load ?
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A. Fan motor

B. All of the above

C. Floor mill motor

D. Conveyor motor

6286. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
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A. Starting characteristics

B. Braking

C. Efficiency

D. Running characteristics

6287. The load cycle for a motor driving a power press will be________________?
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A. continuous but periodical

B. variable load

C. intermittent and variable load

D. continuous

6288. ________________is preferred for automatic drives?
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A. Ward-Leonard controlled D.C. motors

B. Any of the above

C. Squirrel cage induction motor

D. Synchronous motors

6289. Which of the following motors are pre-ferred for overhead travelling cranes ?
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A. Slow speed motors

B. Continuous duty motors

C. Short time rated motors

D. None of the above

6290. When the load is above _______________ a synchronous motor is found to be more economical?
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A. 50 kW

B. 20 kW

C. 100 kW

D. 2 kW

6291. Light duty cranes are used in which of the following ?
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A. All of the above

B. Pumping stations

C. Power houses

D. Automobile workshops

6292. Which of the following motors is preferred for traction work ?
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A. Three-phase induction motor

B. Synchronous motor

C. Universal motor

D. D.C. series motor

6293. The selection of an electric motor for any application depends on which of the following factors ?
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A. All of the above

B. Mechanical characteristics

C. Cost

D. Electrical characteristics

E. Size and rating of motors

6294. If the load factor of a power station is high then its cost of generation will be_______?
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A. High.

B. Low.

C. Depend upon plant type.

D. Remain same.

6295. Annual operating expenditure of a power plant consists of_________?
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A. running charges

B. semi-fixed charges

C. all of the above

D. fixed charges

6296. Load factor of a power station is defined as____________?
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A. average load/maximum demand

B. average load x maximum demand

C. maximum demand/average load

D. none of the above

6297. Which of the following Power Plant causes least environmental pollution____________?
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A. Hydro Power Plant

B. Thermal Power Plant

C. Diesel Power Plant

D. Nuclear Power Plant

6298. Which of the following generating station has minimum running cost?
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A. Nuclear

B. Diesel

C. Thermal

D. Hydro
6299. Which of the following is usually not the generating voltage__________?
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A. 9.9 kV

B. 11kV

C. 6.6 kV

D. 13.2kV

6300. At low value of power factor, the cost of generation of a power station will be____________?
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A. low

B. high

C. none of the above

D. remain same