Power Systems A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is 0 Ω 200 Ω 800 Ω 400 Ω 0 Ω 200 Ω 800 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Resistance switching in normally employed in bulk oil breakers. all breakers. air blast circuit breaker. minimum oil breakers. bulk oil breakers. all breakers. air blast circuit breaker. minimum oil breakers. ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the frequency is increased, then skin effect will any of the above decreases remains unaffected increases any of the above decreases remains unaffected increases ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to 12.5 electrical degrees/s² 225 electrical degrees/s² 22.5 electrical degrees/s² 125 electrical degrees/s² 12.5 electrical degrees/s² 225 electrical degrees/s² 22.5 electrical degrees/s² 125 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems For complete protection of 3-phase system from the short circuit faults minimum number of relays required are one six two three one six two three ANSWER DOWNLOAD EXAMIANS APP
Power Systems Aluminium is now most commonly employed conductor material in transmission lines than copper because it is cheaper and lighter costlier it is more conductive its tensile strength is more it is cheaper and lighter costlier it is more conductive its tensile strength is more ANSWER DOWNLOAD EXAMIANS APP
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