electrical engineering MCQs – Page 28

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 Review each marked answer and report any item that may be outdated or unclear.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

541. Economiser is used to heat_____________?
0

A. air

B. all above

C. flue gases

D. feed water

542. When a conductor carries more current on the surface as compared to core, it is due to___________?
0

A. unsymmetrical fault

B. none of the above

C. skin effect

D. corona

E. permeability variation

543. Short circuit test on transformers is conducted to determine____________?
0

A. hysteresis losses

B. eddy current losses

C. core losses

D. copper losses

544. Reheat factor in steam turbines depends on______________?
0

A. all of the above

B. exit pressure only

C. stage efficiency only

D. initial pressures and temperature only

545. The current drawn by the line due to corona losses is___________?
0

A. square

B. sinusoidal

C. non-sinusoidal

D. triangular

546. Solar thermal power generation can be achieved by_______________?
0

A. using flat plate collectors

B. using a solar pond

C. using focusing collector or heliostates

D. any of the above system

547. A good voltage regulation of a transformer means________________?
0

A. difference between primary and secondary voltage is maximum

B. output voltage fluctuation with power factor is least

C. output voltage fluctuation from no load to full load is least

D. difference between primary and secondary voltage is least

E. ood voltage regulation of a transformer means

548. Which of the following is the demerit of a constant voltage transmission system ?
0

A. Availability of steady voltage at all loads at the line terminals

B. Increase of short-circuit current of the system

C. Improvement of power factor at times of moderate and heavy loads

D. Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

E. Possibility of better protection for the line due to possible use of higher terminal reactants

549. A conductor, due to sag between two supports, takes the form of____________?
0

A. triangle

B. semi-circle

C. catenary

D. ellipse

550. The amount of air which is supplied for complete combustion is called___________?
0

A. secondary air

B. primary air

C. tertiary air

551. The overall efficiency of a steam power station is ________ its thermal efficiency.
0

A. equal to

B. greater than

C. none of the above

D. less than

552. For forced draught system, the function of chimney is mainly_____________?
0

A. none of the above

B. to reduce the temperature of the hot gases discharged

C. to produce draught to accelerate the combustion of fuel

D. to discharge gases high up in the atmosphere to avoid hazard

553. For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?
0

A. 11 kV

B. 33 kV

C. 66 kV

D. 132 kV

554. The efficiency of two identical transformers under load conditions can be determined by_______________?
0

A. short-circuit test

B. any of the above

C. back-to-back test

D. open circuit test

555. The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is__________?
0

A. 0.5457

B. 0.6

C. 0.555

D. 0.578

556. Load curve is useful in deciding the__________?
0

A. sizes of generating units

B. all of the above

C. A. operating schedule of generating units

D. total installed capacity of the plant

557. Regenerative cycle thermal efficiency_______________?
0

A. is always less than simple Rankine cycle thermal efficiency

B. is always greater than simple Rankine thermal efficiency

C. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particular pressure

D. is same as simple Rankine cycle thermal efficiency

558. Compounding of steam turbine is done for_______________?
0

A. reducing the rotor speed

B. reducing the work done

C. balancing the turbine

D. increasing the rotor speed

559. The efficiency of chimney is approximately______________?
0

A. 0.25%

B. 80%

C. 20%

D. 40%

560. Reheat factor is the ratio of_____________?
0

A. cumulative actual enthalpy drop for the stages to total is isentropic enthalpy heat drop

B. isentropic heat drop to useful heat drop

C. adiabatic heat drop to isentropic heat drop

Previous Next

Showing 541 to 560 of 7381 mcqs