Power Systems When a pumped storage power plant is operated in conjunction with a steam power plant All of these the operating cost of the steam plant become optimum load factor of the steam plant is increased chances of the tripping of the system decrease All of these the operating cost of the steam plant become optimum load factor of the steam plant is increased chances of the tripping of the system decrease ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements are true? nether 1 nor 2 Bus admittance matrix is a sparse matrix both 1 and 2 Bus impedance matrix is a full matrix nether 1 nor 2 Bus admittance matrix is a sparse matrix both 1 and 2 Bus impedance matrix is a full matrix ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following faults is/are treated as external faults? All of these Over voltage Failure of excitation Failure of prime mover of the generator All of these Over voltage Failure of excitation Failure of prime mover of the generator ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)? 2 × 106 kV / sec. 3.5 × 106 kV / sec. 1 × 106 kV / sec. 3 × 106 kV / sec. 2 × 106 kV / sec. 3.5 × 106 kV / sec. 1 × 106 kV / sec. 3 × 106 kV / sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is unity 0.5 0 leading 0.707 leading unity 0.5 0 leading 0.707 leading ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%. 48.36 kV 52.84 kV 83.76 kV 20 kV 48.36 kV 52.84 kV 83.76 kV 20 kV ANSWER DOWNLOAD EXAMIANS APP
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