Power Systems Which one of the following relays has the capability of anticipating the possible major fault in a transformer? Buchholz relay Differential relay Over current relay Over fluxing relay Buchholz relay Differential relay Over current relay Over fluxing relay ANSWER DOWNLOAD EXAMIANS APP
Power Systems Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is 200 MW 800 MW 1600 MW 400 MW 200 MW 800 MW 1600 MW 400 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generating station has a maximum demand of 100 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is 80 MW 10 MW 20 MW 15 MW 80 MW 10 MW 20 MW 15 MW 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 22.5 electrical degrees/s² 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which type of connection is employed for current transformers for the protection of delta- star connected 3-phase transformer? delta-star star-star delta-delta star-delta delta-star star-star delta-delta star-delta ANSWER DOWNLOAD EXAMIANS APP
Power Systems Two identical synchronous machines having same inertia constant are connected in parallel and swinging together. The effective inertia constant is 4 MJ/MVA. Then each machine has inertia constant of 8 MJ/MVA 2 MJ/MVA 4 MJ/MVA 16 MJ/MVA 8 MJ/MVA 2 MJ/MVA 4 MJ/MVA 16 MJ/MVA ANSWER DOWNLOAD EXAMIANS APP
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