electrical engineering MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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

601. Method which is commonly applied for unloading the coal for small power plant is___________?
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A. tower cranes

B. lift trucks

C. coal accelerators

D. belt conveyor

602. If the diversity factor of a power station is high then its generation cost is___________?
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A. depend on the plan type

B. high

C. remain same

D. low

603. The use of strain type insulators is made where the conductors are__________?
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A. at intermediate anchor towers

B. any of the above

C. dead ended

D. none of the above

604. Open circuit test on transformers is conducted to determine____________?
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A. core losses

B. hysteresis losses

C. copper losses

D. eddy current losses

605. In jet type condensers___________?
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A. steam and cooling water do not mix

B. cooling water passes through tubes and steam surrounds them

C. steam and cooling water mix

D. steam passes through tubes and cooling water surrounds them

606. Evaporative type of condenser has___________?
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A. water in pipes surrounded by steam

B. none of the above

C. steam in pipes surrounded by water

D. either A. or (b)

607. Constant voltage transmission entails the following disadvantage?
0

A. either of the above

B. large conductor area is required for same power transmission

C. short-circuit current of the system is increased

D. none of the above

608. The commercial sources of energy are____________?
0

A. wood, animal wastes and agriculture wastes

B. none of the above

C. fossil fuels, hydropower and nuclear energy

D. solar, wind and biomass

609. In a power or distribution transformer about 10 per cent end turns are heavily insulated__________?
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A. to absorb the line surge voltage and save the winding of transformer from damage

B. none of the above

C. to reflect the line surge and save the winding of a transformer from damage

D. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns

610. The wooden poles well impregnated with creosite oil or any preservative compound have life_____________?
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A. 60 to 70 years

B. from 2 to 5 years

C. 10 to 15 years

D. 25 to 30 years

611. For Parsons reaction steam turbine, degree of reaction is____________?
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A. 50%

B. 100%

C. 60%

D. 75%

612. Artificial draught is produced by____________?
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A. fan or steam jet

B. all of the above

C. steam jet

D. air fans

613. Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is______________?
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A. any

B. overfeed stoker

C. underfeed stoker

614. The material generally used for armour of high voltage cables is_____________?
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A. steel

B. copper

C. brass

D. aluminium

615. The corona is considerably affected by which of the following _______________?
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A. Surface condition of the conductor

B. All of the above

C. Size of the conductor

D. Shape of the conductor

616. The material commonly used for insulation in high voltage cables is_______________?
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A. rubber

B. none of the above

C. lead

D. paper

617. Which material is used to made a solar cell_______________?
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A. silicon

B. Germanium

C. scandium

D. aluminum

618. The noise produced by a transformer is termed as_______________________?
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A. ringing

B. buzz

C. zoom

D. hum

619. Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?
0

A. less than one

B. approximately equal to one

C. none of the above

D. great than one

620. Which of the following power plant usually offer highest maintenance cost___________?
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A. Thermal power plants

B. Hydro-electric power plants

C. Diesel engine power plant

D. Nuclear power plants

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