Power Systems A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base? 0.1 pu 0.5 pu 0.2 pu 0.4 pu 0.1 pu 0.5 pu 0.2 pu 0.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems a 50 Hz, 3-phase synchronous generator has inductance per phase of 15 mH. The capacitance of the generator and circuit breaker is 0.002 µF. What is its natural frequency? 29 kHz 290 kHz 29 MHz 2.9 kHz 29 kHz 290 kHz 29 MHz 2.9 kHz ANSWER DOWNLOAD EXAMIANS APP
Power Systems Mercury is choice with steam in binary vapor cycle because higher critical temperature and pressure. all of above. higher saturation temperature than other fluids. relative low vaporization pressure. higher critical temperature and pressure. all of above. higher saturation temperature than other fluids. relative low vaporization pressure. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation (Z1 = Z2) < Z0 Z1 = Z2 = Z0 any of the above (Z1 = Z2) > Z0 (Z1 = Z2) < Z0 Z1 = Z2 = Z0 any of the above (Z1 = Z2) > Z0 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 incident current? 2500 A 250 A 100 A 200 A 2500 A 250 A 100 A 200 A ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt? 4.68 msec 1.47 msec 2.63 msec 9.68 4.68 msec 1.47 msec 2.63 msec 9.68 ANSWER DOWNLOAD EXAMIANS APP
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