Power Systems Condition for zero voltage regulation is cosφ = R/X cosφ = X/R tanφ = R/X tanφ = X/R cosφ = R/X cosφ = X/R tanφ = R/X tanφ = X/R ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base? 0.2 pu 0.1 pu 0.4 pu 0.5 pu 0.2 pu 0.1 pu 0.4 pu 0.5 pu 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 1.47 msec 9.68 msec 4.68 msec 2.63 msec 1.47 msec 9.68 msec ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? -0.92 -0.56 0.92 0.56 -0.92 -0.56 0.92 0.56 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Length of the cable is doubled, its capacitance C will be one-fourth. unchanged. doubled. one-half. one-fourth. unchanged. doubled. one-half. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The factor affecting run off are the topography and nature of soil in the catchment area. all of above. rain fall pattern, shape and size of catchment area. amount of vegetation and weather condition in the catchment area. the topography and nature of soil in the catchment area. all of above. rain fall pattern, shape and size of catchment area. amount of vegetation and weather condition in the catchment area. ANSWER DOWNLOAD EXAMIANS APP
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