Power Systems What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system? Sulphur hexafluoride CB Vacuum CB Bulk oil type CB Air blast CB Sulphur hexafluoride CB Vacuum CB Bulk oil type CB Air blast CB 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% 25% 75% 33.33% 66.66% 25% 75% 33.33% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A loss less transmission line has a length of 600 km, find the phase shift of voltage signal? 45° 90° 36° 42° 45° 90° 36° 42° ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following matrix is used for load flow studies? Z bus matrix null matrix Unit matrix Y bus matrix Z bus matrix null matrix Unit matrix Y bus matrix ANSWER DOWNLOAD EXAMIANS APP
Power Systems The conductor carries more current on surface as compared to core. This is called as unsymmetrical fault skin effect All of these corona effect unsymmetrical fault skin effect All of these corona effect ANSWER DOWNLOAD EXAMIANS APP
Power Systems In case of failure of prime mover of the generator, which type of relay is used? distance relays impedance relay reverse power relay offset mho relay distance relays impedance relay reverse power relay offset mho relay ANSWER DOWNLOAD EXAMIANS APP
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