electrical engineering MCQs – Page 173

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 Review each marked answer and report any item that may be outdated or unclear.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
3441. Which of the following motors is preferred for traction work ?
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A. Universal motor

B. Three-phase induction motor

C. Synchronous motor

D. D.C. series motor

3442. ________________ motor is a constant speed motor?
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A. Synchronous motor

B. Induction motor

C. Schrage motor

D. Universal motor

3443. The return circuit for tramcars is through_______________?
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A. rails

B. cables

C. common earthing

D. neutral wire

3444. An ideal value of stability factor is________________?
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A. 200

B. More than 200

C. 100

D. 1

3445. Transistor biasing is done to keep _____________in the circuit?
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A. Proper alternating current

B. Proper direct current

C. The base current small

D. Collector current small

3446. Quadrilateral speed-time curve pertains to which of the following services ?
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A. Main line service

B. Sub-urban service

C. Urban and sub-urban service

D. Urban service

3447. The strength of a semiconductor crystal comes from______________?
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A. Forces between protons

B. Forces between nuclei

C. None of the above

D. Electron-pair bonds
3448. In main line service as compared to urban and suburban service______________?
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A. acceleration and retardation rates are low

B. distance between the stops is more

C. all of the above

D. maximum speed reached is high

3449. With forward bias to a pn junction , the width of depletion layer__________________?
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A. Remains the same

B. None of the above

C. Increases

D. Decreases
3450. Consider the representation of six-bit numbers by twos complement, ones complement, or by sign and magnitude: In which representation is there overflow from the addition of the integers 011000 and 011000 ?
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A. Twos complement and ones complement only

B. Twos complement only

C. All three representations

D. Sign and magnitude and ones complement only

3451. An electric charge at rest produces_______________?
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A. only a magnetic field

B. only an electric field

C. neither electric field nor magnetic field

D. both electric and magnetic fields

3452. The gain of an amplifier is expressed in db because_____________?
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A. Human ear response is logarithmic

B. Calculations become easy

C. None of the above

D. It is a simple unit

3453. When a transistor amplifier is operating, the current in any branch is _______________?
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A. c. only

B. Sum of a.c. and d.c.

C. difference of a.c. and d.c.

D. c. only

3454. Weber is the unit of_____________?
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A. Magnetic field intensity

B. magnetic induction

C. self-inductance

D. magnetic flux
3455. A balanced Wheatstone bridge consists of an RV of 3,500 ?, an R2 of 200 ?, and an R3 of 680 ?. The value of RUNK is____________?
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A. 200 ?

B. 680 ?

C. 1,029 ?

D. 880 ?

3456. Self-inductance of a long solenoid is______________?
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A. ?oN2

B. BA

C. ?oN2A

D. ?oN2/A

3457. For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
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A. 8 W

B. None of the above

C. 10 W

D. 4 W
3458. Energy stored in a magnetic field is given by______________?
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A. L2I/2

B. IL2

C. LI2/2

D. LI2

3459. A Wheatstone bridge can be used to determine an unknown_____________?
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A. resistance

B. power

C. voltage

D. current

3460. The purpose of RC or transformer coupling is to_____________?
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A. Increase thermal stability

B. e of the above

C. Block a.c.

D. Separate bias of one stage from another