Power Systems A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F? 1 F 2 F 4 F 0.5 F 1 F 2 F 4 F 0.5 F ANSWER DOWNLOAD EXAMIANS APP
Power Systems The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is j6 pu j9 pu j3 pu j1 pu j6 pu j9 pu j3 pu j1 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Lightning arresters are used for protection of equipment from open circuits protection of equipment from external lightning protection of equipment from short circuits All of these protection of equipment from open circuits protection of equipment from external lightning protection of equipment from short circuits All of these 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 A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant? 6000 kW 3000 kW 3750 kW 7500 kW 6000 kW 3000 kW 3750 kW 7500 kW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relays are used in protection of medium transmission lines? Mho relays any of the above Admittance relays Impedance relays Mho relays any of the above Admittance relays Impedance relays ANSWER DOWNLOAD EXAMIANS APP
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