Power Systems Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV? 10 13 20 21 10 13 20 21 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of following is a medium and low head turbines Pelton and Kaplan turbines. None of above. Francis and Kaplan turbines. Kaplan and Francis turbines. Pelton and Kaplan turbines. None of above. Francis and Kaplan turbines. Kaplan and Francis turbines. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of high energy loss in condenser low alternator efficiency low steam turbine mechanical efficiency high energy loss in boilers high energy loss in condenser low alternator efficiency low steam turbine mechanical efficiency high energy loss in boilers ANSWER DOWNLOAD EXAMIANS APP
Power Systems A string insulator has 4 units. The voltage across the bottom most unit is 33.33% of total voltage. Its string efficiency is 66.66% 33.33% 25% 75% 66.66% 33.33% 25% 75% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 60 Hz, 320 Km loss less line has sending end voltage 1.0 pu. The receiving end voltage on no-load is 1.1 pu. 1.088 pu. 1.116 pu. none of these. 1.1 pu. 1.088 pu. 1.116 pu. none of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following represents the transmission line positive sequence reactance Xs +2 Xm Xs - Xm Xm - Xs 2Xs + Xm Xs +2 Xm Xs - Xm Xm - Xs 2Xs + Xm ANSWER DOWNLOAD EXAMIANS APP
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