Power Systems Which of the following circuit breakers produce least arc energy? Air blast CB. Air break CB. Plain oil CB. Minimum oil CB. Air blast CB. Air break CB. Plain oil CB. Minimum oil CB. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is low specific speed turbine? None of these Kaplan Francis Pelton None of these Kaplan Francis Pelton ANSWER DOWNLOAD EXAMIANS APP
Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 2nd harmonic current. 7th harmonic current. 5th harmonic current. 3rd harmonic current. 2nd harmonic current. 7th harmonic current. 5th harmonic current. 3rd harmonic current. 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? 30.28 kV 31.28 kV 28.28 kV 29.28 kV 30.28 kV 31.28 kV 28.28 kV 29.28 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems In coal fired thermal power stations, what are the electrostatic precipitators used for? To remove dust particles setting on the bus bar conductors in the station switch yard All of these To keep the air heaters clean To collect the dust particles from the flue gases To remove dust particles setting on the bus bar conductors in the station switch yard All of these To keep the air heaters clean To collect the dust particles from the flue gases ANSWER DOWNLOAD EXAMIANS APP
Power Systems Recovery voltage in CB is equal to transient voltage. normal frequency 50 Hz rms voltage. none of these. arcing period voltage. transient voltage. normal frequency 50 Hz rms voltage. none of these. arcing period voltage. ANSWER DOWNLOAD EXAMIANS APP
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