Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 45 kV 36 kV 32 kV 40 kV 45 kV 36 kV 32 kV 40 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems IF the time of operation of a relay for unity TMS is 10 sec then the time of operation for 0.5 TMS is 20 sec. 10 sec. none of these. 5 sec. 20 sec. 10 sec. none of these. 5 sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.6 pu, Zm =0.5 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.6 pu, Zm =0.5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive sequence reactance will be equal to negative sequence if the equipment is transformer and transmission lines. generator. motor. none of these. transformer and transmission lines. generator. motor. none of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems On what factors does the selection of a water turbine depend Working head. Speed. All of above. Nature of load. Working head. Speed. All of above. Nature of load. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is LL LG LLL LLG LL LG LLL LLG ANSWER DOWNLOAD EXAMIANS APP
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