Power Systems What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system? Sulphur hexafluoride CB Bulk oil type CB Vacuum CB Air blast CB Sulphur hexafluoride CB Bulk oil type CB Vacuum CB Air blast CB ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead -6.92% -10% 10% 6.92% -6.92% -10% 10% 6.92% ANSWER DOWNLOAD EXAMIANS APP
Power Systems The presence of earth in case of overhead lines decrease capacitance increase capacitance decrease inducatance increase inductance decrease capacitance increase capacitance decrease inducatance increase inductance ANSWER DOWNLOAD EXAMIANS APP
Power Systems Reactance relays are used for the protection of long transmission lines only medium transmission lines only All of these short transmission lines only long transmission lines only medium transmission lines only All of these short transmission lines only ANSWER DOWNLOAD EXAMIANS APP
Power Systems A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator? 0.1 1000 10 0.001 0.1 1000 10 0.001 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Per unit of any quantity is defined as actual value of quantity /base value of quantity in same units base value of quantity /actual value of quantity in different units base value of quantity /actual value of quantity in same units actual value of quantity /base value of quantity in different units actual value of quantity /base value of quantity in same units base value of quantity /actual value of quantity in different units base value of quantity /actual value of quantity in same units actual value of quantity /base value of quantity in different units ANSWER DOWNLOAD EXAMIANS APP
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