Power Systems For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence, this must be a short line this may either be a medium line or short line None of these this expression is true for any line this must be a short line this may either be a medium line or short line None of these this expression is true for any line ANSWER DOWNLOAD EXAMIANS APP
Power Systems The Gauss Seidel load flow method has following disadvantages. Which of the following statement is wrong? Unreliable convergence Slow convergence Choice of slack bus affects the convergence A good initial guess for voltages is essential for convergence Unreliable convergence Slow convergence Choice of slack bus affects the convergence A good initial guess for voltages is essential for convergence 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 sinωt? 4.68 msec 2.63 msec 9.68 msec 1.47 msec 4.68 msec 2.63 msec 9.68 msec 1.47 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be 9.936 pu 10.936 pu 8.936 pu 7.936 pu 9.936 pu 10.936 pu 8.936 pu 7.936 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The arc voltage produced in an AC circuit breaker is always in phase with the arc current. leading the arc current by 90°. in phase opposition with the arc current. lagging the arc current by 90°. in phase with the arc current. leading the arc current by 90°. in phase opposition with the arc current. lagging the arc current by 90°. ANSWER DOWNLOAD EXAMIANS APP
Power Systems One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is 140 MWhr 135.3 MWhr 120 MWhr 130.2 MWhr 140 MWhr 135.3 MWhr 120 MWhr 130.2 MWhr ANSWER DOWNLOAD EXAMIANS APP
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