a) Air blast circuit breaker. b) Oil C.B. c) Vacuum C.B. d) Any one of the above. Ans: (c)
a) R.m.s. value b) Peak value c) Average value d) Both r.m.s. and peak value. Ans: (b)
a) Certain conclusions regarding the continuous ageing of an insulation can be drawn. b) The stress distribution is a representation of the service condition. c) Standardization on the magnitude of voltage to be applied is available. d) The stresses do not damage the coil end insulation. Ans: (a)
a) Non-directional relays at the source end and directional relays at the load end. b) Non-directional relays at both the ends. c) Directional relays at the source end and non-directional at the load end. d) Directional relays at both the ends. Ans: (a)
a) 25 amps b) 45 amps c) 50 amps d) None of the above Ans: (d)
a) Its leakage resistance should be greater than the surge impedance. b) Three-phase and two-earth fault relays are required. c) Two-phase and two-earth fault relays are required. d) Two-phase and one-earth fault relays are required. Ans: (b)
a) 400 kΩ b) 40 kΩ c) 5 kΩ d) 4 kΩ Ans: (c)
a) Increases in case of OCB. b) Decreases in case of OCB. c) Interruption is always at first current zero (in OCB) d) None of the above. Ans: (a)
a) Positive sequence b) Zero sequence c) Negative sequence d) Both (a) and (b) Ans: (d)
a) High sequence b) High impedance c) Low resistance d) Low impedance Ans: (c)
Multiple Choice Question (MCQ) of Electric Power page-10:91. An impulse turbine
Multiple Choice Question (MCQ) of Electric Power page-9:81. Spouting velocity is A) Velocity of jet under specified conditions B) Actual velocity of jet C) 50 % of ideal velocity of jet D) Ideal velocity of jet.
Multiple Choice Question (MCQ) of Electric Power page-8:71. In closed cooling system A) water does not flow B) hot water is recirculated after cooling C) air and water cooling is simultaneously used D) constant supply of fresh water for cooling is required.