Power Systems Find the surge impedance of a line when inductance is 160 mH and capacitance is 1µF? 400 Ω 800 Ω 200 Ω 160 Ω 400 Ω 800 Ω 200 Ω 160 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems What type of back up protection is used for alternators? IDMT relay. Mho relay. Impedance relay. Buchholz relay. IDMT relay. Mho relay. Impedance relay. Buchholz relay. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? -0.92 0.56 0.92 -0.56 -0.92 0.56 0.92 -0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit impedance Z(pu) is given by ZΩ* (MVA)b/((KV)²b *100) ZΩ* (MVA)b*100/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ZΩ* (MVA)b*100/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/(KV)²b ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is 500 MJ 50 MJ 5 MJ 10 MJ 500 MJ 50 MJ 5 MJ 10 MJ ANSWER DOWNLOAD EXAMIANS APP
Power Systems Rankine cycle efficiency of a steam power plant is of 45 - 80 %. 30 - 45 %. 60 - 80 %. 20 - 30 %. 45 - 80 %. 30 - 45 %. 60 - 80 %. 20 - 30 %. ANSWER DOWNLOAD EXAMIANS APP
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