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)