Power Systems Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency? 75% 50% 86%% 90% 75% 50% 86%% 90% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which material is used in controlling chain reaction in a nuclear reactor Beryllium. Boron. Thorium. Heavy water. Beryllium. Boron. Thorium. Heavy water. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The arc voltage produced in an AC circuit breaker is always leading the arc current by 90°. in phase with the arc current. lagging the arc current by 90°. in phase opposition with the arc current. leading the arc current by 90°. in phase with the arc current. lagging the arc current by 90°. in phase opposition with the arc current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems If all the sequence voltages at the fault point in a power system are equal, then the fault point is a LG LLL LLG LL LG LLL LLG LL ANSWER DOWNLOAD EXAMIANS APP
Power Systems Fault calculations using computer are usually done by Y bus method either 1 or 2 None of these Z bus method Y bus method either 1 or 2 None of these Z bus method ANSWER DOWNLOAD EXAMIANS APP
Power Systems A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is 10 2 16 6 10 2 16 6 ANSWER DOWNLOAD EXAMIANS APP
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