Power Systems The surge impedance of a 400 km long overhead transmission line is 420 Ω. For a 200 km length of the same line, the surge impedance will be 210 Ω 400 Ω 420 Ω 840 Ω 210 Ω 400 Ω 420 Ω 840 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 36 kV 40 kV 32 kV 45 kV 36 kV 40 kV 32 kV 45 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems The power level of nuclear reactor can be increase by ( K = multiplication factor ) raising the value of K above 1 and keeping it at raised value. raising the value of K above 1, but later bringing it back to K = 1. lowering the value of K below and keeping at that lowered value. lowering the value of K below 1 but later bringing it back to K = 1. raising the value of K above 1 and keeping it at raised value. raising the value of K above 1, but later bringing it back to K = 1. lowering the value of K below and keeping at that lowered value. lowering the value of K below 1 but later bringing it back to K = 1. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The annual depreciation of hydro power plant is about 20 - 25 %. 0.5 - 1.5 %. 10 - 15 %. 15 - 20 %. 20 - 25 %. 0.5 - 1.5 %. 10 - 15 %. 15 - 20 %. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In relay coil which is used? Current transformer. Instrument transformer. Power transformer. Potential transformer. Current transformer. Instrument transformer. Power transformer. Potential transformer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Positive, negative and zero sequence impedances of line are 2,2 and 5 pu respectively. Find self and mutual impedances respectively? 2 and 2 pu 2 and 5 pu 3 and 1 pu 1 and 3 pu 2 and 2 pu 2 and 5 pu 3 and 1 pu 1 and 3 pu ANSWER DOWNLOAD EXAMIANS APP
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