electrical engineering MCQs – Page 33

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 Review each marked answer and report any item that may be outdated or unclear.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

641. Edwards air pump____________?
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A. removes only air from condenser

B. removes air alongwith vapour and also the condensed water from condenser

C. removes air and also vapour from condenser

D. removes only un-condensed vapour from condenser

642. When the interconnector between two stations has large reactance?
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A. the stations will fall out of step because of large angular displacement between the stations

B. the transfer of power will take place with voltage fluctuation and noise

C. none of the above

D. the transfer of power will take place with least loss

643. The skin effect of a conductor will reduce as the__________?
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A. permeability of conductor material increases

B. diameter increases

C. resistivity of conductor material increases

D. frequency increases

644. The draught produced by chimney of given height at given outside temperature___________?
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A. may increase or decrease

B. decreases if the chimney gas temperature increases

C. remains same irrespective of chimney gas temperature

D. increases if the chimney gas temperature increases

645. In hydro power plant, the graph between discharge and time is known as___________?
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A. monograph.

B. discharge graph.

C. load graph.

D. hydro graph

646. Which of the following insulating materials can withstand the highest temperature safely ?
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A. Asbestos

B. Glass fibre

C. Mica

D. Cellulose

647. The voltage of a single solar cells is about
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A. 0.5 volt

B. 1. 5 volt

C. 1.8 volt

D. 1 volt

648. In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
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A. none of the above

B. copper losses

C. hysteresis and eddy current losses

D. friction and windage losses

649. Which of the following acts as a protection against high voltage surges due to lightning and switching ?
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A. Conservator

B. Breather

C. Thermal overload relays

D. Horn gaps

650. Which of the following parts of a transformer is visible from outside ?
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A. Primary winding

B. Core

C. Secondary winding

D. Bushings

651. Which of the following materials is used for overhead transmission lines ?
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A. Any of the above

B. Cadmium copper

C. Steel cored aluminium

D. Galvanised steel

652. Reheat cycle in steam power plant is used to________________?
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A. utilise heat of flue gases

B. improve condenser performance

C. reduce loss of heat

D. increase thermal efficiency

653. A feeder, in a transmission system, feeds power to________________?
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A. distributors

B. service mains

C. generating stations

D. all of the above

654. A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is______________?
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A. none of the above

B. one-half

C. one-third

D. one-fourth

E. twice

655. The proper indication of incomplete combustion is_______________?
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A. the smoking exhaust from chimney

B. high CO content in flue gases at exit

C. high temperature of flue gases

D. high CO2 content in flue gases at exit

656. Demand factor is defined as___________?
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A. connected load/maximum demand.

B. average load x maximum load

C. maximum demand/connected load

D. average load/maximum load.

657. There is a greater possibility of occurence of corona during______________?
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A. humid weather

B. summer heat

C. dry weather

D. winter

E. none of the above

658. A gas turbine basically work on
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A. Dual cycle

B. Brayton cycle

C. Carnot cycle

D. Rankin cycle

659. In a substation the following equipment is not installed?
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A. voltatre transformers

B. shunt reactors

C. series capacitors

D. exciters

660. Electro-mechanical voltage regulators are generally used in___________?
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A. transformers

B. reactors

C. all of the above

D. generators

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