Power Systems Condition for zero voltage regulation is tanφ = X/R tanφ = R/X cosφ = X/R cosφ = R/X tanφ = X/R tanφ = R/X cosφ = X/R cosφ = R/X ANSWER DOWNLOAD EXAMIANS APP
Power Systems When a transformer is loaded, the secondary terminal voltage gains. That means power factor is zero. lagging. unity. leading. zero. lagging. unity. leading. 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? 9.68 4.68 msec 2.63 msec 1.47 msec 9.68 4.68 msec 2.63 msec 1.47 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems The daily energy produced in thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station? 30 MW 50 MW 72 MW 720 MW 30 MW 50 MW 72 MW 720 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Breaking current is a ------------------ value? average RMS any of the above maximum average RMS any of the above maximum ANSWER DOWNLOAD EXAMIANS APP
Power Systems The line currents of 3-phase supply are: IR = 3 + j 5 A IY =2 + j 2 A IB = -2 - j 1 A The zero sequence current will be 1 + j 2 A 1 + j 4 A -2 - j 1 A 5 + j 7 A 1 + j 2 A 1 + j 4 A -2 - j 1 A 5 + j 7 A ANSWER DOWNLOAD EXAMIANS APP
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