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? 1.47 msec 4.68 msec 9.68 msec 2.63 msec 1.47 msec 4.68 msec 9.68 msec 2.63 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine. ash handling point. economizer. air preheater. superheater. ash handling point. economizer. air preheater. superheater. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠90° Ω, C = 0.5*10-6∠90° ℧. Find the no load receiving end voltage? 500 kV 320 kv 600 kV 400 kV 500 kV 320 kv 600 kV 400 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power generating station has a maximum demand of 1000 MW. The annual load factor is 75% and plant capacity factor is 60%. Calculate the reserve capacity? 500 MW 750 MW 1250 MW 250 MW 500 MW 750 MW 1250 MW 250 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation (Z1 = Z2) < Z0 any of the above (Z1 = Z2) > Z0 Z1 = Z2 = Z0 (Z1 = Z2) < Z0 any of the above (Z1 = Z2) > Z0 Z1 = Z2 = Z0 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power generating station has a plant capacity of 200 MW and maximum power demand is 150 MW. If average power generation is 110 MW, then find the load factor and capacity factor respectively? 0.55 and 0.733 0.65 and 0.55 0.733 and 0.65 0.733 and 0.55 0.55 and 0.733 0.65 and 0.55 0.733 and 0.65 0.733 and 0.55 ANSWER DOWNLOAD EXAMIANS APP
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