Power Systems Which of the following is/are the stator faults? Inter phase faults failure of excitation All of these over current Inter phase faults failure of excitation All of these over current ANSWER DOWNLOAD EXAMIANS APP
Power Systems The draft tube is provided to None of these raise the water surface of the stream to create an artificial head. increase the acting head on the water wheel. reduce the effect of water hammer. None of these raise the water surface of the stream to create an artificial head. increase the acting head on the water wheel. reduce the effect of water hammer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems More efficient plants are used as base load plant both 1 and 2 None of these peak load plant base load plant both 1 and 2 None of these peak load plant ANSWER DOWNLOAD EXAMIANS APP
Power Systems In coal fired thermal power stations, what are the electrostatic precipitators used for? To keep the air heaters clean All of these To collect the dust particles from the flue gases To remove dust particles setting on the bus bar conductors in the station switch yard To keep the air heaters clean All of these To collect the dust particles from the flue gases To remove dust particles setting on the bus bar conductors in the station switch yard ANSWER DOWNLOAD EXAMIANS APP
Power Systems The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this? LL. LG. LLG. LLLG. LL. LG. LLG. LLLG. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line is compensated with shunt capacitance Csh. If the uncompensated transmission line surge impedance is Zs, then find the new surge impedance Zn after shunt compensation? Zs*√(1 + Kcsh) Zs/√(1 + Kcsh) All of these √(1 + Kcsh)/Zs Zs*√(1 + Kcsh) Zs/√(1 + Kcsh) All of these √(1 + Kcsh)/Zs ANSWER DOWNLOAD EXAMIANS APP
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