Power Systems The positive sequence reactance will be equal to negative sequence if the equipment is transformer and transmission lines. motor. generator. none of these. transformer and transmission lines. motor. generator. none of these. 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 500 MVA 400 MVA 100 MVA 200 MVA 500 MVA 400 MVA 100 MVA 200 MVA ANSWER DOWNLOAD EXAMIANS APP
Power Systems Corona loss is ----------------- on hilly areas than as plain areas. None of these remain same less more None of these remain same less more ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a short circuit test circuit breaker, time to reach the peak re-striking voltage 60 microsecond & the peak re-striking voltage 120 kV. Determine average RRRV (Rate of rise re-striking voltage)? 1 × 106 kV / sec. 3.5 × 106 kV / sec. 3 × 106 kV / sec. 2 × 106 kV / sec. 1 × 106 kV / sec. 3.5 × 106 kV / sec. 3 × 106 kV / sec. 2 × 106 kV / sec. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements is/are true? Corona is reduced by All of these increasing the distance between the conductor decreasing the supply frequency increasing the radius of the conductor All of these increasing the distance between the conductor decreasing the supply frequency increasing the radius of the conductor ANSWER DOWNLOAD EXAMIANS APP
Power Systems Zero sequence currents can flow from a line into a transformer bank if the windings are in delta / delta. ground star / delta. delta / star. star / grounded star. delta / delta. ground star / delta. delta / star. star / grounded star. ANSWER DOWNLOAD EXAMIANS APP
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