Power Systems The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called damping time. coasting time. stopping time. settling time. damping time. coasting time. stopping time. settling time. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage? 82.15 kV/phase 17.32 kV/phase 34.64 kV/phase 41.075 kV/phase 82.15 kV/phase 17.32 kV/phase 34.64 kV/phase 41.075 kV/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems Mho relay is usually employed for protection of long transmission lines only short transmission lines only any line medium transmission lines only long transmission lines only short transmission lines only any line medium transmission lines only ANSWER DOWNLOAD EXAMIANS APP
Power Systems Corona loss is ----------------- on hilly areas than as plain areas. None of these more remain same less None of these more remain same less ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of following is a medium and low head turbines Francis and Kaplan turbines. None of above. Kaplan and Francis turbines. Pelton and Kaplan turbines. Francis and Kaplan turbines. None of above. Kaplan and Francis turbines. Pelton and Kaplan turbines. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 50 Hz, 17.32 kV generator is connected to a power system. The system reactance and capacitance per phase are 10 mH and 0.2 mF respectively. What is the maximum voltage across the contacts of the circuit breaker at an instant when it passes through zero? 29.28 kV 30.28 kV 31.28 kV 28.28 kV 29.28 kV 30.28 kV 31.28 kV 28.28 kV ANSWER DOWNLOAD EXAMIANS APP
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