electrical engineering MCQs – Page 366

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 Review each marked answer and report any item that may be outdated or unclear.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

7301. Which of the following distribution systems is more reliable?
0

A. All are equally reliable

B. Ring main system

C. Radial system

D. Tree system

7302. A circuit is disconnected by isolators when____________?
0

A. line is on full load

B. line is energized

C. circuit breaker is not open

D. there is no current in the line

7303. The angular displacement between two interconnected stations is mainly due to___________?
0

A. armature reactance of both alternators

B. reactance of the interconnector

C. synchronous reactance of both the alternators

D. all of the above

7304. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
0

A. Static condenser

B. Booster transformer

C. Synchronous condenser

D. Tap changing transformer

7305. The current drawn by the line due to corona losses is___________?
0

A. square

B. sinusoidal

C. triangular

D. non-sinusoidal

7306. Overhead lines generally use__________________?
0

A. all aluminium conductors

B. A.C.S.R. conductors

C. copper conductors

D. none of these

7307. The material commonly used for insulation in high voltage cables is_______________?
0

A. paper

B. rubber

C. lead

D. none of the above

7308. The material commonly used for sheaths of underground cables is______________?
0

A. rubber

B. iron

C. copper

D. lead

7309. If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
0

A. Ohms law

B. Faradays law

C. Kelvins law

D. Kirchhoffs law

E. none of the above

7310. _______________are the conductors, which connect the consumers terminals to the distribution?
0

A. Distributors

B. Service mains

C. Feeders

D. None of the above

7311. For an overhead line, the surge impedance is taken as________________?
0

A. 20-30 ohms

B. 7080 ohms

C. none of the above

D. 5001000 ohms

E. 100200 ohms

7312. Which of the following is the demerit of a constant voltage transmission system ?
0

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

B. Increase of short-circuit current of the system

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

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

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

7313. Which of the following is usually not the generating voltage ?
0

A. 13.2 kV

B. 11 kV

C. 8.8 kV

D. 6.6 kV

7314. Which of the following characteristics should the line supports for transmission lines possess?
0

A. All of the above

B. High mechanical strength

C. Low cost

D. Longer life

7315. When the interconnector between two stations has large reactance?
0

A. none of the above

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

C. the stations will fall out of step because of large angular displacement between the stations

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

7316. Which of the following is not a constituent for making porcelain insulators ?
0

A. Kaolin

B. Quartz

C. Felspar

D. Silica

7317. The minimum clearance between the ground and a 220 kV line is about_________________?
0

A. 4.3 m

B. 10.5 m

C. 5.5 m

D. 7.0 m

7318. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?
0

A. 31.25 percent of copper

B. 66.7 percent of copper

C. 125 percent of copper

D. 33.3 percent of copper

7319. In the analysis of which of the following lines shunt capacitance is neglected?
0

A. Medium as well as long transmission lines

B. Short transmission lines

C. Long transmission lines

D. Medium transmission lines

7320. Which of the following methods is used for laying of underground cables ?
0

A. Solid system

B. All of the above

C. Draw-in-system

D. Direct laying

Previous Next

Showing 7301 to 7320 of 7381 mcqs