Power Systems Which of the following is/are the disadvantages of phase modifiers? It consumes both active and reactive power It requires more maintenance because of running equipment Initial cost of synchronous phase modifier is higher All of these It consumes both active and reactive power It requires more maintenance because of running equipment Initial cost of synchronous phase modifier is higher All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems In kaplan runner, the number of blades is generally of the order of 3 - 6. 16 - 24. 1 - 2. 12 - 16. 3 - 6. 16 - 24. 1 - 2. 12 - 16. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Stock bridge dampers are used to All of these reduce the vibrations at the point of support reduce the tension increase the sag All of these reduce the vibrations at the point of support reduce the tension increase the sag 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 7.25 pu 3.75 pu 2.5 pu 4.28 pu 7.25 pu 3.75 pu 2.5 pu 4.28 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Radio interference occur in telecommunication line due to nether 1 nor 2 both 1 and 2 electro magnetic induction electro static induction nether 1 nor 2 both 1 and 2 electro magnetic induction electro static induction ANSWER DOWNLOAD EXAMIANS APP
Power Systems A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred? LL LLL LG LLG LL LLL LG LLG ANSWER DOWNLOAD EXAMIANS APP
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