a) One CT in each phase and fourth in the neutral are provided and their secondaries are connected in parallel b) One CT is provided in the neutral c) Two CT are provided, one in R-phase and other in Y-phase with a CT in neutral d) In fact CTs are not required at all the fault current is not very high Ans: (a)
a) Improve line voltage b) Compensate for line inductive reactance c) Compensate for line capacitive reactance d) None of the above Ans: (b)
a) 5 sec b) 0.5 sec c) 0.1 sec d) 50 millisecond e) 100 micro-second Ans: (d)
a) True b) False Ans: (b)
a) Redundant only b) Redundant and independent only c) Reliable d) Independent e) None of the above Ans: (b)
a) Boiler tubes only b) Turbine and steam line c) Turbine only d) None of the above Ans: (c)
a) The zero sequence reactance of a transformer is approximately equal to negative sequence reactance. b) The zero sequence reactance of transformer is approximately equal to positive sequence reactance. c) The zero sequence reactance depends on the connection and winding of the transformer. d) The zero sequence reactance is large than negative sequence reactance but less than positive sequence reactance in the transformer. Ans: (c)
a) Upto 11 kV b) Upto 33 kV c) Above 220 kV d) Above 132 kV e) Above 110 kV Ans: (d)
a) Directional unit b) None-directional unit c) None of the above Ans: (a)
a) Of an order of a few second b) Without any time delay c) One second d) 0.01 second Ans: (d)
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.