electrical engineering MCQs – Page 278

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 Review each marked answer and report any item that may be outdated or unclear.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 generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

5541. Moisture content in the soil __________ the earth soil resistance?
0

A. decrease

B. does not affect

C. none of the above

D. increase

5542. Ground resistance should be designed such that_____________?
0

A. grounding resistance should be always zero

B. grounding resistance should be as high as possible

C. none of the above

D. grounding resistance should be as low as possible

5543. Factors on which soil resistance depends_______________?
0

A. moisture

B. depth of the electrode

C. all the above

D. Nacl

5544. The objective of earthing or grounding is_______________?
0

A. none of the above

B. to provide as low resistance possible to the ground

C. to provide as high resistance possible to the ground

D. to provide flow of positive, negative and zero sequence currents

5545. Generally grounding is provided for
0

A. only for the safety of the equipment

B. only for the safety of the operating personnel

C. both (A) and (B)

D. none of the above

5546. The purpose of capacitors in a transistor amplifier is to___________________?
0

A. Couple or bypass a.c. component

B. Provide biasing

C. Protect the transistor

D. Cool the transistor

5547. In the zero signal conditions, a transistor sees _____________ load?
0

A. c.

B. c.

C. both d.c. and a.c.

D. none of the above

5548. The purpose of d.c. conditions in a transistor is to___________________?
0

A. None of the above

B. Set up operating point

C. Reverse bias the emitter

D. Forward bias the collector

5549. The purpose of a coupling capacitor in a transistor amplifier is to ___________________?
0

A. Protect the transistor

B. Increase the output impedance of transistor

C. Provide biasing

D. Pass a.c. and block d.c.

5550. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
0

A. Open

B. Partially open

C. None of the above

D. Short

5551. If the collector supply is 10V, then collector cut off voltage under d.c. conditions is _______________?
0

A. 2 V

B. 10 V

C. 20 V

D. 5 V

5552. A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ________________________?
0

A. RC RE

B. RC || RE

C. RC + RE

D. RC

5553. The input capacitor in an amplifier is the______________ capacitor?
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A. Leakage

B. Coupling

C. Bypass

D. None of the above

5554. If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?
0

A. 5 k?

B. 10 k?

C. 20 k?

D. 2 k?

5555. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?
0

A. Biasing circuit

B. None of the above

C. Transistor

D. Collector supply VCC

5556. The d.c. load of a transistor amplifier is generally_______________ that of a a.c. load?
0

A. None of the above

B. Less than

C. More than

D. The same as

5557. The phase difference between the output and input voltages of a CE amplifier is _____________?
0

A. 180o

B. 0o

C. 90o

D. 270o

5558. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?
0

A. 270o

B. 180o

C. 90o

D. 0o

5559. If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?
0

A. RC

B. RL + RC

C. RC || RL

D. RL RC

5560. In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of _____________________?
0

A. RL

B. RC || RL

C. RC

D. RC + RL

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