Power Systems Skin effect depends on frequency All of these conductivity relative permeability frequency All of these conductivity relative permeability ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following contributes to the Rankine cycle efficiency improvement in a thermal power plant Reheat of steam an intermediate stages. All of these Use of steam for heating of boiler feed water. Use of high pressure. Reheat of steam an intermediate stages. All of these Use of steam for heating of boiler feed water. Use of high pressure. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base? 0.5 pu 0.4 pu 0.2 pu 0.1 pu 0.5 pu 0.4 pu 0.2 pu 0.1 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.6 pu, Zm =0.5 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.6 pu, Zm =0.5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)? 3 × 106 kV / sec. 3.5 × 106 kV / sec. 1 × 106 kV / sec. 2 × 106 kV / sec. 3 × 106 kV / sec. 3.5 × 106 kV / sec. 1 × 106 kV / sec. 2 × 106 kV / sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage? 36. 36 kV 100 kV 18.18 kV 30.6 Kv 36. 36 kV 100 kV 18.18 kV 30.6 Kv ANSWER DOWNLOAD EXAMIANS APP
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