Power Systems Power transmission lines are transposed to reduce proximity effect skin effect ferranti effect radio interference proximity effect skin effect ferranti effect radio interference ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of pumped storage plants is/are All of these used as load frequency control most economical as a peak load supply plant operating time is minimum All of these used as load frequency control most economical as a peak load supply plant operating time is minimum ANSWER DOWNLOAD EXAMIANS APP
Power Systems A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator 16. 24. 12. 6. 16. 24. 12. 6. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by Zs = 0.2 pu, Zm =0.7 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.6 pu, Zm =0.5 pu Zs = 0.2 pu, Zm =0.7 pu Zs = 0.7 pu, Zm =0.2 pu Zs = 0.5 pu, Zm =0.6 pu Zs = 0.6 pu, Zm =0.5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems To prevent maloperation of deferentially connected relay while energizing a transformer, the relay restraining coil is biased with 7th harmonic current. 5th harmonic current. 2nd harmonic current. 3rd harmonic current. 7th harmonic current. 5th harmonic current. 2nd harmonic current. 3rd harmonic current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relationships are not valid for short transmission lines A = D = 1 Is = Ir B = C = Z All of these A = D = 1 Is = Ir B = C = Z All of these ANSWER DOWNLOAD EXAMIANS APP
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