Power Systems A cable has inductance of 0.22 mH per km and capacitance of 0.202 µF per km. The surge impedance of the cable is 28 Ω 40 Ω 52 Ω 33 Ω 28 Ω 40 Ω 52 Ω 33 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 11.8% 88.2% 85% 15% 11.8% 88.2% 85% 15% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following represents the transmission line positive sequence reactance Xs - Xm Xm - Xs 2Xs + Xm Xs +2 Xm Xs - Xm Xm - Xs 2Xs + Xm Xs +2 Xm ANSWER DOWNLOAD EXAMIANS APP
Power Systems The amount of ash content in Indian coal 60 %. 20 %. 45 %. 35 %. 60 %. 20 %. 45 %. 35 %. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following plants has the maximum eapital cost Hydro-plants. Steam plants. Nuclear plants. Diesel plants. Hydro-plants. Steam plants. Nuclear plants. Diesel plants. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The use of high speed circuit breakers increased the short circuit current. reduces the short circuit current. improves system stability. decrease system stability. increased the short circuit current. reduces the short circuit current. improves system stability. decrease system stability. ANSWER DOWNLOAD EXAMIANS APP
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