Power Systems Advantages of per unit system is/are All of these No units for any quantity Need of transformation ratio It has units for all quantities All of these No units for any quantity Need of transformation ratio It has units for all quantities ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is 400 Ω 800 Ω 200 Ω 0 Ω 400 Ω 800 Ω 200 Ω 0 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems The load current in short circuit calculations are neglected because short circuit currents are much larger than load currents short circuit currents are greatly out of phase with load currents nether 1 nor 2 both 1 and 2 short circuit currents are much larger than load currents short circuit currents are greatly out of phase with load currents nether 1 nor 2 both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Find the relation between sub transient (X"), transient (X') and synchronous reactance (X) ? X" > X' >X X" < X' < X X" > X' < X X" < X' > X X" > X' >X X" < X' < X X" > X' < X X" < X' > X 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 0.56 0.92 -0.92 -0.56 0.56 0.92 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The voltage regulation of a line at full load 0.8 power factor is 11. A long transmission line under no load conditions, for a good voltage profile needs shunt reactor at receiving end All of these shunt capacitor at receiving end shunt resistance at receiving end shunt reactor at receiving end All of these shunt capacitor at receiving end shunt resistance at receiving end ANSWER DOWNLOAD EXAMIANS APP
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