electrical engineering MCQs – Page 145

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 Review each marked answer and report any item that may be outdated or unclear.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

2881. The weight of copper of both armature and field windings decreases with __________ in number of poles?
0

A. none of the above

B. decrease

C. either of the above

D. increase

2882. Two multimeters A and B have sensitivities of 10 kO/V and 30 kO/V respectively. Then ______________?
0

A. Multimeter A is more sensitive

B. Multimeter B is more sensitive

C. Both are equally sensitive

D. None of the above

2883. A voltmeter should have ____________resistance?
0

A. Zero

B. Very high

C. None of the above

D. Very low

2884. ICs are generally made of ________________?
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A. None of the above

B. Copper

C. Silicon

D. Germanium

2885. The slot leakage can be calculated by making which of the following assumptions ?
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A. The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero

B. All of the above

C. The leakage path is straight across the slot and around the iron at the bottom

D. The current in the slot conductors is uniformly distributed over their cross-section

2886. __________is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
0

A. High carbon steel

B. Grey cast-iron

C. Stainless steel

D. Cast steel

2887. A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ______________?
0

A. None of the above

B. G+S

C. G-S

D. GS/(G+S)

2888. With direct water cooling it is possible to have ratings of about_____________?
0

A. 300 MW

B. 200 MW

C. 600 MW

D. 400 MW

2889. The pinch-off voltage of a JFET is about _______________?
0

A. 15 V

B. 0.6 V

C. 25 V

D. 5 V

2890. The most inexpensive switch is _____________ switch?
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A. None of the above

B. Electronic

C. Mechanical

D. Electromechanical

2891. A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage ?
0

A. 7 V

B. 8 V

C. 2 V

D. 6 V

2892. Which of the following methods is used for air cooling of turbo-alternators ?
0

A. One sided axial ventilation

B. Multiple inlet system

C. Two sided axial ventilation

D. All of the above

2893. The horizontal plates of a CRO are supplied with _____________ to observe the waveform of signal?
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A. Cosine wave

B. None of the above

C. Sinusoidal wave

D. Sawtooth wave

2894. The high voltage winding is usually which of the following type ?
0

A. All of the above types

B. Cylindrical winding with circular conductors

C. Continuous disc type winding with rectangular conductors

D. Cross-over winding with either circular or small rectangular conductors

2895. One would find a clamping circuit in ___________________?
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A. Receiving antenna

B. Television receiver

C. Radio transmitter

D. Radio receiver

2896. Helical windings are used in________________?
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A. none of the above

B. shell type transformers

C. power transformers

D. distribution transformers

2897. A Zener diode that has very narrow depletion layer will breakdown by____________ mechanism?
0

A. Avalanche

B. Zener

C. Both avalanche and Zener

D. None of the above

2898. Hot rolled sheets have ___________ value of permeability?
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A. zero

B. high

C. low

D. none of the above

2899. The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are______________?
0

A. 0.5 to 0.8 Wb/m2

B. 0.8 to 1.0 Wb/m2

C. 1.4 to 1.8 Wb/m2

D. 1.1 to 1.35 Wb/m2

2900. The source terminal of a JEFT corresponds to _____________ of a vacuum tube?
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A. plate

B. cathode

C. grid

D. none of the above

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