Power Systems The use of high speed circuit breakers reduces the short circuit current. increased the short circuit current. decrease system stability. improves system stability. reduces the short circuit current. increased the short circuit current. decrease system stability. improves system stability. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is 25 Ω 1000 Ω 250 Ω 500 Ω 25 Ω 1000 Ω 250 Ω 500 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is 130.2 MWhr 120 MWhr 140 MWhr 135.3 MWhr 130.2 MWhr 120 MWhr 140 MWhr 135.3 MWhr ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inductance of single phase two wire line is given by 0.4×10-7× ln(r'/d) H/m 0.4×10-7× ln(d/r') H/m 4×10-7× ln(r'/d) H/m 4×10-7× ln(d/r') H/m 0.4×10-7× ln(r'/d) H/m 0.4×10-7× ln(d/r') H/m 4×10-7× ln(r'/d) H/m 4×10-7× ln(d/r') H/m ANSWER DOWNLOAD EXAMIANS APP
Power Systems Ideal plant load cfactor is 1 less than 1 0 greater than 1 1 less than 1 0 greater than 1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is 35 kA. 50 kA. 55 kA. 45 kA. 35 kA. 50 kA. 55 kA. 45 kA. ANSWER DOWNLOAD EXAMIANS APP
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