Power Systems The per unit impedance Z(pu) is given by ZΩ* (MVA)b*100/(KV)²b ZΩ* (MVA)b/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ZΩ* (MVA)b*100/(KV)²b ZΩ* (MVA)b/(KV)²b ZΩ* (kVA)b/(KV)²b ZΩ* (MVA)b/((KV)²b *100) ANSWER DOWNLOAD EXAMIANS APP
Power Systems The steam power plant efficiency can be improved by using high temperature and high pressure steam. decreasing the load on the plant. burning large amount of coal. using large quantity of water. using high temperature and high pressure steam. decreasing the load on the plant. burning large amount of coal. using large quantity of water. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called damping time. coasting time. settling time. stopping time. damping time. coasting time. settling time. stopping time. 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 0.92 0.56 -0.56 -0.92 0.92 0.56 -0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relays is/are unit protection relays? Buccholz relays both 1 and 2 Differential relays over current relays Buccholz relays both 1 and 2 Differential relays over current relays ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power station has a maximum demand of 15 MW. The plant capacity is 20 MW. Find the reserve capacity of the plant? 5 MW 20 MW 10 MW 15 MW 5 MW 20 MW 10 MW 15 MW ANSWER DOWNLOAD EXAMIANS APP
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