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? 0.92 0.56 -0.92 -0.56 0.92 0.56 -0.92 -0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Percentage of carbon is highest in coal gas. bituminous coal. anthracite coal. lignite coal. coal gas. bituminous coal. anthracite coal. lignite coal. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Proximity effect is more in case of None of these same in both cases power cables over head lines None of these same in both cases power cables over head lines ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inductance of single phase two wire line is given by 0.4×10-7× ln(r'/d) H/m 4×10-7× ln(r'/d) H/m 4×10-7× ln(d/r') H/m 0.4×10-7× ln(d/r') H/m 0.4×10-7× ln(r'/d) H/m 4×10-7× ln(r'/d) H/m 4×10-7× ln(d/r') H/m 0.4×10-7× ln(d/r') H/m ANSWER DOWNLOAD EXAMIANS APP
Power Systems The draft tube is provided to reduce the effect of water hammer. raise the water surface of the stream to create an artificial head. increase the acting head on the water wheel. None of these reduce the effect of water hammer. raise the water surface of the stream to create an artificial head. increase the acting head on the water wheel. None of these 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 reflected voltage? 18.18 kV 81.82 kV -81.82 kV -18.18 kV 18.18 kV 81.82 kV -81.82 kV -18.18 kV ANSWER DOWNLOAD EXAMIANS APP
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