Power Systems What is the approximate efficiency of a normal thermal power station? 60-70% 45-55% 20-25% 30-40% 60-70% 45-55% 20-25% 30-40% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line long transmission line any of the above medium transmission line short transmission line long transmission line any of the above medium transmission line short transmission line 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? 4.68 msec 1.47 msec 9.68 2.63 msec 4.68 msec 1.47 msec 9.68 2.63 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems Equal area criteria is used for absolute stability of the system nether 1 nor 2 either 1 or 2 relative stability of the system absolute stability of the system nether 1 nor 2 either 1 or 2 relative stability of the system ANSWER DOWNLOAD EXAMIANS APP
Power Systems A hydro power plant of run off river type should be provided with pondage so that the operating head is controlled. firm capacity of plant is increased. pressure inside the turbine casing remains. kinetic energy of the running water is fully utilized. operating head is controlled. firm capacity of plant is increased. pressure inside the turbine casing remains. kinetic energy of the running water is fully utilized. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging. 56 %. 14 %. None of above 28 %. 56 %. 14 %. None of above 28 %. ANSWER DOWNLOAD EXAMIANS APP