Power Systems Critical mass is a mass of fissionable material required to stop a chain reaction. maximum mass of fissionable material required to sustain a chain reaction. none of these. minimum mass of fissionable material required to sustain chain reaction. a mass of fissionable material required to stop a chain reaction. maximum mass of fissionable material required to sustain a chain reaction. none of these. minimum mass of fissionable material required to sustain chain reaction. ANSWER DOWNLOAD EXAMIANS APP
Power Systems An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is 2 6 8 5 2 6 8 5 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to 12.5 electrical degrees/s² 225 electrical degrees/s² 125 electrical degrees/s² 22.5 electrical degrees/s² 12.5 electrical degrees/s² 225 electrical degrees/s² 125 electrical degrees/s² 22.5 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following grounding is not practically preferred for protection of equipments? reactance grounding isolated grounding All of these resistance grounding reactance grounding isolated grounding All of these resistance grounding ANSWER DOWNLOAD EXAMIANS APP
Power Systems The draft tube is provided to raise the water surface of the stream to create an artificial head. None of these increase the acting head on the water wheel. reduce the effect of water hammer. raise the water surface of the stream to create an artificial head. None of these increase the acting head on the water wheel. reduce the effect of water hammer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Earth fault relay uses the which of the following sequence currents? positive sequence negative sequence zero sequence any of the above positive sequence negative sequence zero sequence any of the above ANSWER DOWNLOAD EXAMIANS APP
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