Power Systems Buchholz relay is used for protection of bus bar. alternator. none of these. transformer. bus bar. alternator. none of these. transformer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Advantages of higher transmission voltage is/are Area of cross section and volume of the conductor is reduced All of these Transmission line losses are reduced Power transfer capability of the transmission line is increased Area of cross section and volume of the conductor is reduced All of these Transmission line losses are reduced Power transfer capability of the transmission line is increased 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 125 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 225 electrical degrees/s² 125 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 225 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage? 34.64 kV/phase 41.075 kV/phase 82.15 kV/phase 17.32 kV/phase 34.64 kV/phase 41.075 kV/phase 82.15 kV/phase 17.32 kV/phase ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power generating station has a maximum demand of 1000 MW. The annual load factor is 75% and plant capacity factor is 60%. Calculate the reserve capacity? 250 MW 500 MW 1250 MW 750 MW 250 MW 500 MW 1250 MW 750 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems String efficiency depends upon voltage rating of whole string. voltage rating of one SCR. all of these. no. of SCR in the string. voltage rating of whole string. voltage rating of one SCR. all of these. no. of SCR in the string. ANSWER DOWNLOAD EXAMIANS APP
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