Power Systems The conductor carries more current on surface as compared to core. This is called as corona effect All of these skin effect unsymmetrical fault corona effect All of these skin effect unsymmetrical fault ANSWER DOWNLOAD EXAMIANS APP
Power Systems The function of a surge tank is to produce surge in the pipeline. none of above. relieve water hammer pressure in the penstock. supply water at constant pressure. produce surge in the pipeline. none of above. relieve water hammer pressure in the penstock. supply water at constant pressure. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In case of failure of prime mover of the generator, which type of relay is used? distance relays reverse power relay offset mho relay impedance relay distance relays reverse power relay offset mho relay impedance relay ANSWER DOWNLOAD EXAMIANS APP
Power Systems Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line? 50 Hz -0.52 Hz 0.52 Hz 0.48 Hz 50 Hz -0.52 Hz 0.52 Hz 0.48 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems Surge impedance loading (SIL) is represented by both 1 and 2 Vl²/Zs Vl²*√(C/L) Vph²/Zs both 1 and 2 Vl²/Zs Vl²*√(C/L) Vph²/Zs ANSWER DOWNLOAD EXAMIANS APP
Power Systems A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred? LLL LG LL LLG LLL LG LL LLG ANSWER DOWNLOAD EXAMIANS APP
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