Power Systems Making and breaking currents of 3 phase AC circuit breakers in power system are respectively in what form? RMS and RMS value any of the above RMS and Instantaneous value Instantaneous and RMS value RMS and RMS value any of the above RMS and Instantaneous value Instantaneous and RMS value ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power station plant load factor is defined as the ratio of average load to the peak load the energy generated to that of maximum energy that could have been generated minimum load to average load minimum load to peak load average load to the peak load the energy generated to that of maximum energy that could have been generated minimum load to average load minimum load to peak load ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of pumped storage plants is/are operating time is minimum All of these used as load frequency control most economical as a peak load supply plant operating time is minimum All of these used as load frequency control most economical as a peak load supply plant ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? 0.56 0.92 -0.92 -0.56 0.56 0.92 -0.92 -0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 2.5 pu 3.75 pu 7.25 pu 4.28 pu 2.5 pu 3.75 pu 7.25 pu 4.28 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems If transmission line parameters A and B are 0.9∠0° and 200∠90° respectively. Find the shunt reactor required to compensate the ferranti effect? 3000 Ω 1500 Ω 750 Ω 2000 Ω 3000 Ω 1500 Ω 750 Ω 2000 Ω ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS