Power Systems Gross head of an hydroelectric power station is the height of water level in the river where the storage is provided. the height of water level in the river where the tail race is provided. the difference of water level between the level in storage and tail race. all of above. the height of water level in the river where the storage is provided. the height of water level in the river where the tail race is provided. the difference of water level between the level in storage and tail race. all of above. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Installation of capacitors at suitable locations and of optimum size in a distribution system results in improved voltage regulation reduction of KVA rating of distribution transformers All of these reduction in distribution power loss improved voltage regulation reduction of KVA rating of distribution transformers All of these reduction in distribution power loss ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has surge impedance of 400 Ω, operating at Vs = Vr = 400 kV line is compensated with a shunt capacitance of 30%. The line is connected to a generator delivering 200 MW. Find the load angle with out and with compensation respectively? 30° and 45° 26° and 30° 45° and 26° 30° and 26° 30° and 45° 26° and 30° 45° and 26° 30° and 26° ANSWER DOWNLOAD EXAMIANS APP
Power Systems On what factor does the performance of a circuit breaker depend? Critical length of breaking. Breaking speed. Both A and C. None of these. Critical length of breaking. Breaking speed. Both A and C. None of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Condition for zero voltage regulation is cosφ = R/X tanφ = R/X tanφ = X/R cosφ = X/R cosφ = R/X tanφ = R/X tanφ = X/R cosφ = X/R ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of shunt compensation is/are It requires less maintanance All of these single unit can be used as both capacitance and inductor by adjusting the excitation smooth voltage regulation is possible by controlling excitation It requires less maintanance All of these single unit can be used as both capacitance and inductor by adjusting the excitation smooth voltage regulation is possible by controlling excitation ANSWER DOWNLOAD EXAMIANS APP
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