Power Systems Lightning arresters are made up of which material? silicon oxide any of the above silver copper silicon oxide any of the above silver copper ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the reflected voltage? 81.82 kV -81.82 kV -18.18 kV 18.18 kV 81.82 kV -81.82 kV -18.18 kV 18.18 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs. 3. 7. 20. 5. 3. 7. 20. 5. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Length of short transmission line is up to 40 km 150 km 80 km any of the above 40 km 150 km 80 km any of the above ANSWER DOWNLOAD EXAMIANS APP
Power Systems A load centre is at an equidistant from the two thermal generating stations G1 and G2. The fuel cost characteristics of the generating stations are given by F1 = a + bP1 + cP²1 F2 = a + b P2 + 2cP²2 Where P1 and P2 are the generation in MW of G1 and G2, respectively. For most economic generation to meet 300 MW of load, P1 and P2 respectively, are 175, 125 100, 200 200, 100 150, 150 175, 125 100, 200 200, 100 150, 150 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 29.28 kV 28.28 kV 30.28 kV 31.28 kV 29.28 kV 28.28 kV 30.28 kV ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS