a) Series b) Parallel c) Star d) Delta Ans: (a)
a) Zero sequence component b) Positive sequence component c) Complex conjugate of the positive sequence component d) Complex conjugate of the zero sequence component Ans: (c)
a) Infinity at infinite time b) Maximum at infinite time c) Zero at infinite time d) 10 mA at infinite time Ans: (c)
a) Transient reactance b) Synchronous reactance c) Sub-tranisent reactance d) All of these Ans: (b)
a) Synchronous reactance b) Transient reactance c) Sub-tranisent reactance d) All of these Ans: (d)
a) Suppression coils b) Current limiting resistors c) Compensation reactors d) All of these Ans: (d)
a) Open circuit impedance of 400 Ω b) Line can be theoretically loaded upto 400 Ω c) Line can be practically loaded upto 400 Ω d) Short circuit impedance of 400 Ω Ans: (b)
a) Active power, reactive power b) Active power, active power c) Reactive power, reactive power d) Reactive power, active power Ans: (a)
a) Phase faults only b) Earth fault only c) Both phase and earth faults d) None of these Ans: (c)
a) Overcurrent relays. b) Temperature sensitive relays. c) A combination of (a) and (b). d) A combination of (b) and (c). Ans: (b)
a) Air blast C.B. b) M.O.C.B. c) SF6 Breaker d) None of the above Ans: (c)
a) Low overload currents. b) Short circuit current. c) Under all abnormal current. d) The combination is never used in practice. Ans: (a)
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.