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 400 Ω 420 Ω 210 Ω 840 Ω 400 Ω 420 Ω 210 Ω 840 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A thermal protection switch is used to provide protection against overload. short circuit. temperature. over voltage. overload. short circuit. temperature. over voltage. 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 12. 6. 24. 16. 12. 6. 24. 16. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Reheat cycle in thermal power plant is used to utilize heat of flue gases. increase thermal efficiency. reduce loss of heat. improve condenser performance. utilize heat of flue gases. increase thermal efficiency. reduce loss of heat. improve condenser performance. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following grounding is not practically preferred for protection of equipments? All of these resistance grounding reactance grounding isolated grounding All of these resistance grounding reactance grounding isolated grounding ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage? 18.18 kV 36. 36 kV 100 kV 30.6 Kv 18.18 kV 36. 36 kV 100 kV 30.6 Kv ANSWER DOWNLOAD EXAMIANS APP
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