Power Systems A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base? 0.2 pu 0.25 pu 1 pu 5 pu 0.2 pu 0.25 pu 1 pu 5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 36 kV 32 kV 45 kV 40 kV 36 kV 32 kV 45 kV 40 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems In thermal plant most of the energy is wasted in turbines boiler ESP condenser turbines boiler ESP condenser 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 500 Ω 250 Ω 1000 Ω 25 Ω 500 Ω 250 Ω 1000 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems How to find the total number of strands (N) when number of layers (x) are given Total number of strands N = 3x² + 3x - 1 Total number of strands N = 3x² - 3x + 1 Total number of strands N = 3x² + 3x + 1 Total number of strands N = 3x² - 3x - 1 Total number of strands N = 3x² + 3x - 1 Total number of strands N = 3x² - 3x + 1 Total number of strands N = 3x² + 3x + 1 Total number of strands N = 3x² - 3x - 1 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has self and mutual impedances are 0.8 and 0 pu respectively. Find the positive, negative and zero sequence impedances respectively? 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 1.2 pu 0.6, 0.6 and 0.6 pu 0.8, 0.8 and 0.8 pu 0.6, 0.8 and 1.2 pu 0.6, 0.6 and 1.2 pu 0.6, 0.6 and 0.6 pu 0.8, 0.8 and 0.8 pu ANSWER DOWNLOAD EXAMIANS APP
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