Power Systems The most commonly used material for insulators of overhead lines is porcelain PVC glass mica porcelain PVC glass mica 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 cosωt? 2.63 msec 9.68 4.68 msec 1.47 msec 2.63 msec 9.68 4.68 msec 1.47 msec ANSWER DOWNLOAD EXAMIANS APP
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? 13 21 10 20 13 21 10 20 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Bundled conductors in EHV transmission lines increase inductance decrease capacitance decrease inducatance increase capacitance increase inductance decrease capacitance decrease inducatance increase capacitance ANSWER DOWNLOAD EXAMIANS APP
Power Systems In relay coil which is used? Instrument transformer. Current transformer. Potential transformer. Power transformer. Instrument transformer. Current transformer. Potential transformer. Power transformer. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Keeping in view the cost and overall effectiveness, the following circuit breaker is best suited for capacitor bank switching? SF6 CB. Oil CB. Air blast CB. Vacuum CB. SF6 CB. Oil CB. Air blast CB. Vacuum CB. ANSWER DOWNLOAD EXAMIANS APP
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