Power Systems Which of the following decides the insulation level of 400 kV, EHV line? skin effect radio interference switching over voltage lighting voltage skin effect radio interference switching over voltage lighting voltage ANSWER DOWNLOAD EXAMIANS APP
Power Systems Frequencies must be same in which of the following line to exchange the power from one place to other place ? Asynchronous line Synchronous line both 1 and 2 No need of same frequency for exchange of power Asynchronous line Synchronous line both 1 and 2 No need of same frequency for exchange of power ANSWER DOWNLOAD EXAMIANS APP
Power Systems In order to have lower cost of power generaion the load factor should be low but diversity factor should be high the load factor should be high but diversity factor should be low the load factor and diversity factor should be low The load factor and diversity factor should be high the load factor should be low but diversity factor should be high the load factor should be high but diversity factor should be low the load factor and diversity factor should be low The load factor and diversity factor should be high ANSWER DOWNLOAD EXAMIANS APP
Power Systems A three phase, 33 kV oil circuit breaker is rated 1200 A, the symmetrical breaking capacity is 2000 MVA, 3 secs. Then the making capacity is 5500 MVA. 5100 MVA. 5200 MVA. 5000 MVA. 5500 MVA. 5100 MVA. 5200 MVA. 5000 MVA. 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? 28.28 kV 31.28 kV 29.28 kV 30.28 kV 28.28 kV 31.28 kV 29.28 kV 30.28 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following represents the transmission line positive sequence reactance Xs +2 Xm 2Xs + Xm Xm - Xs Xs - Xm Xs +2 Xm 2Xs + Xm Xm - Xs Xs - Xm ANSWER DOWNLOAD EXAMIANS APP
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