Power Systems The insulation of the modern EHV lines is designed based on the lighting voltage. the switch voltage. R × I. corona. the lighting voltage. the switch voltage. R × I. corona. ANSWER DOWNLOAD EXAMIANS APP
Power Systems One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is 130.2 MWhr 135.3 MWhr 120 MWhr 140 MWhr 130.2 MWhr 135.3 MWhr 120 MWhr 140 MWhr ANSWER DOWNLOAD EXAMIANS APP
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 840 Ω 400 Ω 420 Ω 210 Ω 840 Ω 400 Ω 420 Ω 210 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time? 0.85 Hz -0.85 Hz 0.76 Hz -0.76 Hz 0.85 Hz -0.85 Hz 0.76 Hz -0.76 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems Resistance switching in normally employed in air blast circuit breaker. all breakers. minimum oil breakers. bulk oil breakers. air blast circuit breaker. all breakers. minimum oil breakers. bulk oil breakers. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Earthing switch is used for discharging residual energies measuring of safety voltage protection of equipment from ground faults All of these discharging residual energies measuring of safety voltage protection of equipment from ground faults All of these ANSWER DOWNLOAD EXAMIANS APP
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