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 6. 24. 12. 16. 6. 24. 12. 16. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relays is/are unit protection relays? Differential relays over current relays both 1 and 2 Buccholz relays Differential relays over current relays both 1 and 2 Buccholz relays ANSWER DOWNLOAD EXAMIANS APP
Power Systems An isolated synchronous generator with transient reactance equal to 0.1 pu on a 100 MVA base is connected to the high voltage bus through a step up transformer of reactance 0.1 pu on a 100 MVA base. The fault level at the bus is 100 MVA 500 MVA 200 MVA 400 MVA 100 MVA 500 MVA 200 MVA 400 MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the disadvantages of phase modifiers? It requires more maintenance because of running equipment It consumes both active and reactive power All of these Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment It consumes both active and reactive power All of these Initial cost of synchronous phase modifier is higher ANSWER DOWNLOAD EXAMIANS APP
Power Systems In which of the following given faults, all the sequence currents are equal? LG LLL LLG LL LG LLL LLG LL ANSWER DOWNLOAD EXAMIANS APP
Power Systems Efficiency of thermal power plant can be taken as product of efficiencies of all stages. generator efficiency. turbine efficiency. efficiency of thermal cycle. product of efficiencies of all stages. generator efficiency. turbine efficiency. efficiency of thermal cycle. ANSWER DOWNLOAD EXAMIANS APP
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