Power Systems Which of the following contributes to the Rankine cycle efficiency improvement in a thermal power plant Reheat of steam an intermediate stages. Use of steam for heating of boiler feed water. Use of high pressure. All of these Reheat of steam an intermediate stages. Use of steam for heating of boiler feed water. Use of high pressure. All of these 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? -0.52 Hz 0.52 Hz 50 Hz 0.48 Hz -0.52 Hz 0.52 Hz 50 Hz 0.48 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu? 1.375 pu 2.4 pu 0.2 pu 3.975 pu 1.375 pu 2.4 pu 0.2 pu 3.975 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems In which power plant, the thermal efficiency is quite low Nuclear power plant. Diesel power plant. Steam power plant. Hydro power plant. Nuclear power plant. Diesel power plant. Steam power plant. Hydro power plant. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Merze price current scheme protection is used in both A and B. bus bars. alternator. transformer. both A and B. bus bars. alternator. transformer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The load current in short circuit calculations are neglected because short circuit currents are much larger than load currents short circuit currents are greatly out of phase with load currents nether 1 nor 2 both 1 and 2 short circuit currents are much larger than load currents short circuit currents are greatly out of phase with load currents nether 1 nor 2 both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
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