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 420 Ω 840 Ω 400 Ω 210 Ω 420 Ω 840 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following circuit breakers produce least arc energy? Plain oil CB. Minimum oil CB. Air blast CB. Air break CB. Plain oil CB. Minimum oil CB. Air blast CB. Air break CB. ANSWER DOWNLOAD EXAMIANS APP
Power Systems By using guard ring in a transmission line, its string efficiency decrease remains unaffected None of these increase decrease remains unaffected None of these increase ANSWER DOWNLOAD EXAMIANS APP
Power Systems One Kg of natural uranium gives energy equivalent to about 100 Kg of coal. 10500 Kg of coal. 1000 Kg of coal. 5000 Kg of coal. 100 Kg of coal. 10500 Kg of coal. 1000 Kg of coal. 5000 Kg of coal. ANSWER DOWNLOAD EXAMIANS APP
Power Systems When a nuclear reaction is operating at constant power the multiplication factor is less than 1. greater than 1. may be any of the above. 1. less than 1. greater than 1. may be any of the above. 1. 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 6. 16. 12. 24. 6. 16. 12. 24. ANSWER DOWNLOAD EXAMIANS APP
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