Power Systems A transmission line is compensated with shunt capacitance Csh. If the uncompensated transmission line surge impedance is Zs, then find the new surge impedance Zn after shunt compensation? √(1 + Kcsh)/Zs All of these Zs/√(1 + Kcsh) Zs*√(1 + Kcsh) √(1 + Kcsh)/Zs All of these Zs/√(1 + Kcsh) Zs*√(1 + Kcsh) ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 3-phase, 5 kV, 5 MVA system, what is the base impedance? 5 ohms 50 ohms 0.5 ohm 500 ohms 5 ohms 50 ohms 0.5 ohm 500 ohms ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation any of the above (Z1 = Z2) < Z0 Z1 = Z2 = Z0 (Z1 = Z2) > Z0 any of the above (Z1 = Z2) < Z0 Z1 = Z2 = Z0 (Z1 = Z2) > Z0 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string insulator has 4 units. The voltage across the bottom most unit is 33.33% of total voltage. Its string efficiency is 33.33% 25% 75% 66.66% 33.33% 25% 75% 66.66% 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 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 if the mutual couplings between transmission lines are absent if both 2 and 3 are satisfied ANSWER DOWNLOAD EXAMIANS APP
Power Systems The voltage and current instantaneous values are given as 5 sin (ωt + 30°) pu and 2 sin (ωt - 15°) pu respectively. Find the per unit active power? 3.535 pu 7 pu 5 pu 5.353 pu 3.535 pu 7 pu 5 pu 5.353 pu ANSWER DOWNLOAD EXAMIANS APP
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