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 mutual couplings between transmission lines are absent if both 2 and 3 are satisfied if the shunt admittances at the buses are ignored always if the mutual couplings between transmission lines are absent if both 2 and 3 are satisfied if the shunt admittances at the buses are ignored always 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? 40 kV 45 kV 36 kV 32 kV 40 kV 45 kV 36 kV 32 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation? 0.8 lag and 0.8 lead 0.6 lag and 0.8 lead 0.6 lag and 0.6 lead 0.8 lag and 0.6 lead 0.8 lag and 0.8 lead 0.6 lag and 0.8 lead 0.6 lag and 0.6 lead 0.8 lag and 0.6 lead ANSWER DOWNLOAD EXAMIANS APP
Power Systems The presence of earth in case of overhead lines decrease capacitance decrease inducatance increase capacitance increase inductance decrease capacitance decrease inducatance increase capacitance increase inductance ANSWER DOWNLOAD EXAMIANS APP
Power Systems An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred? 5 pu 2.67 pu 6 pu 2 pu 5 pu 2.67 pu 6 pu 2 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are advantages of N-R method? Applicable for large power system network Time taken for each iteration is less both 1 and 2 Number of iterations are less Applicable for large power system network Time taken for each iteration is less both 1 and 2 Number of iterations are less ANSWER DOWNLOAD EXAMIANS APP
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