B. generate reactive power when fully loaded and absorb reactive power on light loads
C. generate reactive power on light loaded as well as fully loaded
D. absorb reactive power on light loads as well as fully loaded
1. Under overexcitation synchronous phase modifier works as
2. The neutral of the power system may be connected to earth
3. A 100 Ah capacity battery should deliver a current of 10 A for approximately _____ hrs.
4. For the 400KV line, The Spacing Between phase conductors is around
5. Shunt capacitors in a sub-station
6. An alternator is said to be over-excited when it is operating at
7. Series capacitors are used to
8. Disadvantage of low power factor is
9. The color of neutral three core flexible cable is
10. The location of ground faults in underground cables can be found by
11. Fault location in an HV cable is done by
13. Which of the following is not a valid advantage of bundle conductor?
14. The surge resistance of cables is
15. Skin effect is only noticeable at _______ frequencies.
16. When transmission voltage is increased, the line losses are
17. Var compensators are used to
18. High voltage transmission lines use
19. The material used for insulators are
20. Isolator in substation is open under ------------- condition?
21. The surge impedance value of overhead lines is
22. Surge impedance loading of a transmission line is also known as
23. Cables used for underground services from 33 kV to 60 kV are
24. The minimum clearance distance that equipment should be kept away from 50 kV power lines is
25. The cheap and temporary system of the internal wiring is?
27. To improve power factor and feeder voltage controller, which compensation is required
28. Method of voltage control adopted for transmission lines in AC systems is
29. The skin effect in a transmission line is affected by
30. What is the result of the Skin Effect?
31. Transmission efficiency increases as
32. An isolator in Hv substation is used for
33. For a short tie line fed at both end , what is the best choice of protection?
34. For protection of transformer, restraint used to guard against
36. Pin insulators are used up to voltage of about
37. Corona effect can be detected by
39. The effect of wind pressure is more predominant on
40. Transposition of the transmission line is adopted to make ......... uniform throughout the line.
41. The Power Transmitted will be maximum when
42. In a substation the equipment used to limit short circuit current level is
43. In order to increase the limit of the distance of transmission line
44. In series R - L - C circuit the condition for resonance is
45. The most commonly used method for the protection of three phase feeder is
46. Power station and substations are protected against Direct strokes lightning using
48. Simultaneous tripping of the circuit breaker at both ends of transmission line is achieved by
49. Interposing current transformer is used in differential protection of a transformer to
50. The magnitude of generator earth fault current is limited by
51. A wire pilot is Generally economical for distance up to
52. An overhead transmission line is provided with earth wire for protection against
55. The statutory limit for voltage variation at the consumer's terminal is
56. A line from which loads are tapped off is called
57. The bulk power consumers are supplied at
58. By which of the following a bus-bar is rated?
60. By which of the following systems electric power may be transmitted?