Power Systems If transmission line parameters A and B are 0.9∠0° and 200∠90° respectively. Find the shunt reactor required to compensate the ferranti effect? 2000 Ω 750 Ω 3000 Ω 1500 Ω 2000 Ω 750 Ω 3000 Ω 1500 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system? Bulk oil type CB Sulphur hexafluoride CB Air blast CB Vacuum CB Bulk oil type CB Sulphur hexafluoride CB Air blast CB Vacuum CB ANSWER DOWNLOAD EXAMIANS APP
Power Systems The power output of a nuclear power station is proportional to square of the rate at which fission reaction occurs. none of above. square root of the rate at which fission reaction occurs. the rate at which fission reaction occurs. square of the rate at which fission reaction occurs. none of above. square root of the rate at which fission reaction occurs. the rate at which fission reaction occurs. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems The use of high speed circuit breakers decrease system stability. improves system stability. reduces the short circuit current. increased the short circuit current. decrease system stability. improves system stability. reduces the short circuit current. increased the short circuit current. 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 (Z1 = Z2) > Z0 any of the above (Z1 = Z2) < Z0 Z1 = Z2 = Z0 (Z1 = Z2) > Z0 any of the above (Z1 = Z2) < Z0 ANSWER DOWNLOAD EXAMIANS APP
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