Power Systems A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging. 56 %. 28 %. 14 %. None of above 56 %. 28 %. 14 %. None of above ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation (Z1 = Z2) > Z0 any of the above Z1 = Z2 = Z0 (Z1 = Z2) < Z0 (Z1 = Z2) > Z0 any of the above Z1 = Z2 = Z0 (Z1 = Z2) < Z0 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is 4 pu 0.2 pu 0.5 pu 2 pu 4 pu 0.2 pu 0.5 pu 2 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the stator faults? over current Inter phase faults failure of excitation All of these over current Inter phase faults failure of excitation All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero always if the shunt admittances at the buses are ignored if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent always if the shunt admittances at the buses are ignored if both 2 and 3 are satisfied if the mutual couplings between transmission lines are absent ANSWER DOWNLOAD EXAMIANS APP
Power Systems What is the total installed power capacity (MW) in West Bengal as published by ministry of power in 2011? 15515.22. 6114.05. 10000.32. 8113.27. 15515.22. 6114.05. 10000.32. 8113.27. ANSWER DOWNLOAD EXAMIANS APP
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