Power Systems What will be the ratio of the C.T. on the H.V side of a 3 - φ star / delta 33 / 11 kV transformer if the protecting CT on the LV side has a ratio of 300 : 5 ? 100 : 5 / √3. 200 : 5 / √3. 120 : 6 / √3. 150 : 4 / √3. 100 : 5 / √3. 200 : 5 / √3. 120 : 6 / √3. 150 : 4 / √3. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Where the voltage is high and current to be interrupted is low, Which of following the breaker is preferable? Vacuum CB. Any of these. Air blast CB. Oil CB. Vacuum CB. Any of these. Air blast CB. Oil CB. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Units of incremental cost is RsMW/hr Rs/MWhr MWhr/Rs Rs/hr RsMW/hr Rs/MWhr MWhr/Rs Rs/hr 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 boilers low steam turbine mechanical efficiency low alternator efficiency high energy loss in condenser high energy loss in boilers low steam turbine mechanical efficiency low alternator efficiency high energy loss in condenser ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt? 4.68 msec 2.63 msec 9.68 msec 1.47 msec 4.68 msec 2.63 msec 9.68 msec 1.47 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems Ideal plant load cfactor is 0 1 less than 1 greater than 1 0 1 less than 1 greater than 1 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS