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 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? 31.28 kV 28.28 kV 30.28 kV 29.28 kV 31.28 kV 28.28 kV 30.28 kV 29.28 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Operator "a" rotates a vector clock wise direction anti clock wise direction nether 1 nor 2 either 1 or 2 clock wise direction anti clock wise direction nether 1 nor 2 either 1 or 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The receiving end voltage for a long line under no load condition is less than the sending end voltage equal to the sending end voltage any of the above more than the sending end voltage less than the sending end voltage equal to the sending end voltage any of the above more than the sending end voltage ANSWER DOWNLOAD EXAMIANS APP
Power Systems A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be PG1 = 0 MW and PG2 = 250 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the stator faults? Inter phase faults failure of excitation All of these over current Inter phase faults failure of excitation All of these over current ANSWER DOWNLOAD EXAMIANS APP
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