Power Systems The arc voltage produced in an AC circuit breaker is always lagging the arc current by 90°. leading the arc current by 90°. in phase opposition with the arc current. in phase with the arc current. lagging the arc current by 90°. leading the arc current by 90°. in phase opposition with the arc current. in phase with the arc current. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Generation of of one watt needs about ______________ fission per second 3.1 × 107. 3.1. 3.1 × 1010. 3.1 × 106. 3.1 × 107. 3.1. 3.1 × 1010. 3.1 × 106. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the disadvantages of phase modifiers? All of these It consumes both active and reactive power Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment All of these It consumes both active and reactive power Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment 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 24. 12. 16. 6. 24. 12. 16. 6. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Ships are usually supplied power by None of above. Steam accumulator. Diesel engine. Hydraulic turbine. None of above. Steam accumulator. Diesel engine. Hydraulic turbine. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be 0.0030 0.60 0.30 0.0060 0.0030 0.60 0.30 0.0060 ANSWER DOWNLOAD EXAMIANS APP
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