electrical engineering MCQs – Page 30

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 Review each marked answer and report any item that may be outdated or unclear.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

581. The maximum percentage gain in Regenerative feed heating cycle thermal efficiency____________?
0

A. none of the above

B. decreases with number of feed heaters increasing

C. increases with number of feed heaters increasing

D. remains same unaffected by number of feed heaters

582. The efficiencies of transformers compared with that of electric motors of the same power are____________?
0

A. somewhat smaller

B. about the same

C. much higher

D. much smaller

E. none of the above

583. The pressure at the furnace is minimum in case of___________?
0

A. induced draught system

B. natural draught system

C. balanced draught system

D. forced draught system

584. The size of a transformer core will depend on__________?
0

A. A. and B. both

B. area of the core

C. frequency

D. flux density of the core material

585. Carnot cycle comprises of_______?
0

A. two isentropic processes and two constant volume processes

B. two isothermal processes and three constant pressure processes

C. none of the above

D. two isentropic processes and two constant pressure processes

586. The transformer oil should have _______ volatility and _______ viscosity?
0

A. low,low

B. high,low

C. high,high

D. low,high

587. Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________?
0

A. 50 percent

B. 25 percent

C. 75 percent

D. 100 percent

588. Which of the following power plant has least fuel transportation______________?
0

A. diesel generating plants

B. steam power stations

C. thermal power plants

D. nuclear power plants

589. Overhead system can be designed for operation up to____________?
0

A. 33 kV

B. 400 kV

C. 66 kV

D. 11 kV

590. A steam power stations basically work on the______________?
0

A. Vapor pressure cycle

B. Carton cycle

C. Rankin cycle

D. thermodynamic cycle

591. The loads on distributors systems are generally__________________?
0

A. either of the above

B. none of the above

C. unbalanced

D. balanced

592. In fuel cell, the ___________ energy is converted into electrical energy?
0

A. mechanical

B. chemical

C. heat

D. sound

593. In De Laval steam turbine___________?
0

A. none from the above

B. the pressure in the turbine rotor is higher than pressure in the condenser

C. the pressure in the turbine rotor is approximately same as in condenser

D. the pressure in the turbine rotor gradually decreases from inlet to exit from condenser

594. Steam turbines are governed by the following methods_____________?
0

A. Throttle governing

B. Nozzle control governing

C. all of the above

D. By-pass governing

595. In a tap changing transformer, the tappings are provided on__________?
0

A. secondary winding

B. any of the above

C. high voltage winding

D. primary winding

596. Overhead lines generally use__________________?
0

A. all aluminium conductors

B. A.C.S.R. conductors

C. none of these

D. copper conductors

597. Parsons turbine is___________?
0

A. simple single wheel reaction steam turbine

B. pressure compounded steam turbine

C. simple single wheel, impulse steam turbine

D. multi wheel reaction steam turbine

598. The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?
0

A. 0.578

B. 0.6

C. 0.555

D. 0.5457

599. The value of reheat factor normally varies from___________?
0

A. 1.02 to 1.06

B. 0.9 to 0.95

C. 1.2 to 1.6

D. 0.5 to 0.6

600. For the safety of a steam boiler the number of safety valves fitted are____________?
0

A. four

B. three

C. one

D. two

Previous Next

Showing 581 to 600 of 7381 mcqs