Power Systems A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is 10 20 4 8 10 20 4 8 ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 4.28 pu 3.75 pu 2.5 pu 7.25 pu 4.28 pu 3.75 pu 2.5 pu 7.25 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following grounding is not practically preferred for protection of equipments? reactance grounding resistance grounding isolated grounding All of these reactance grounding resistance grounding isolated grounding All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems A gas turbine power plant is best suited for None of these. Peak load. Base load. Emergency. None of these. Peak load. Base load. Emergency. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The rating of CB is in terms of volt - ampere. voltage. current. VAR. volt - ampere. voltage. current. VAR. 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 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 always ANSWER DOWNLOAD EXAMIANS APP
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