electrical engineering MCQs – Page 171

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 Review each marked answer and report any item that may be outdated or unclear.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
3401. Specific energy consumption is least in ________________ service?
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A. urban

B. suburban

C. main line
3402. For 25 kV single phase system power supply frequency is_______________?
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A. 25 Hz

B. 16 Hz

C. 50 Hz

D. 60 Hz

3403. A silicon transistor is biased with base resistor method. If =100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?
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A. 105 kO

B. None of the above

C. 315 kO

D. 530 kO
3404. Which of the following state capitals is not on broad gauge track ?
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A. Jaipur

B. Bhopal

C. Lucknow

D. Chandigarh

3405. Which of the following happens when star-delta starter is used ?
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A. Starting voltage is reduced

B. Starting current is reduced

C. Both A. and B.

D. None of the above

3406. What is/are the configurable functions of each and every IOBs connected around the FPGA device from the operational point of view ?
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A. All of the above

B. Bi-directional I/O pin access

C. Tristate output operation

D. Input operation

3407. The wheels of a train, engine as well as bogies, are slightly tapered to_____________?
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A. facilitate in taking turns

B. facilitate braking

C. reduce friction

D. increase friction

3408. In ________________ method of staging three phase induction motors the starting voltage is not reduced?
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A. auto-transformer

B. any of the above

C. star-delta

D. slip ring
3409. The diameter of the rotor shaft for an electric motor depends on which of the following ?
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A. Horse power only

B. Horse power and r.p.m.

C. Horse power, r.p.m. and power factor

D. r.p.m. only

3410. _______________method can bring the locomotive to dead stop?
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A. Regenerative braking

B. None of the above

C. Plugging braking

D. Rheostatic braking

3411. The rate of acceleration on suburban orurban services is restricted by the consideration of______________?
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A. Track curves

B. Passenger Discomfort

C. Track size

D. Engine power

3412. For blowers which of the following motor is preferred ?
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A. D.C. series motor

B. Wound rotor induction motor

C. D.C. shunt motor

D. Squirrel cage induction motor

3413. Operating point represents__________________?
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A. Values of IC and VCE when signal is applied

B. None of the above

C. Zero signal values of IC and VCE

D. The magnitude of signal

3414. For a D.C. shunt motor which of the following is incorrect ?
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A. Torque-armature current is a straight line

B. Unsuitable for heavy duty starting

C. Torque is zero for zero armature current

D. Torque varies as armature current

3415. The efficiency of diesel locomotives is nearly_______________?
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A. 45 to 55 percent

B. 30 to 40 percent

C. 60 to 70 percent

D. 20 to 25 percent
3416. ________________is preferred for automatic drives?
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A. Squirrel cage induction motor

B. Synchronous motors

C. Any of the above

D. Ward-Leonard controlled D.C. motors
3417. The operating point is also called the _______________?
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A. Quiescent point

B. None of the above

C. Saturation point

D. Cut off point

3418. If the temperature increases, the value of VCE_________________?
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A. Remains the same

B. Is decreased

C. None of the above

D. Is increased

3419. Which of the following motors are best for the rolling mills ?
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A. D.C. motors

B. Squirrel cage induction motors

C. Slip ring induction motors

D. Single phase motors

3420. The coasting retardation is around_________________?
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A. 0.16 km phps

B. 1.6 km phps

C. 40 km phps

D. 16 km phps