Power Systems A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging. 56 %. 28 %. None of above 14 %. 56 %. 28 %. None of above 14 %. ANSWER DOWNLOAD EXAMIANS APP
Power Systems On what factor does the performance of a circuit breaker depend? Critical length of breaking. Breaking speed. None of these. Both A and C. Critical length of breaking. Breaking speed. None of these. Both A and C. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the methods of improving transient stability? Dynamic breaking All of these Fast acting excitation control Fast acting governing system Dynamic breaking All of these Fast acting excitation control Fast acting governing system ANSWER DOWNLOAD EXAMIANS APP
Power Systems The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called stopping time. coasting time. settling time. damping time. stopping time. coasting time. settling time. damping time. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a three-phase system, when the loads are perfectly balanced, the neutral current is zero. one - third of minimum. two - thirds of maximum. one - third of maximum. zero. one - third of minimum. two - thirds of maximum. one - third of maximum. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Critical disruptive voltage is a voltage at which nether 1 nor 2 both 1 and 2 corona is visible with blue or violet colour corona is just initiated nether 1 nor 2 both 1 and 2 corona is visible with blue or violet colour corona is just initiated ANSWER DOWNLOAD EXAMIANS APP
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