Power Systems Which of the following represents the sag(S) of a transmission line? S = wl²/16T S = wl²/2T S = wl²/8T S = wl²/4T S = wl²/16T S = wl²/2T S = wl²/8T S = wl²/4T ANSWER DOWNLOAD EXAMIANS APP
Power Systems Three generators rated 100 MVA, 11 kV have an impedance of 0.15 pu each. If in the same plant, these generators are being replaced by a single equivalent generator, the effective impedance of equivalent generator will be 0.05 pu 0.25 pu 0.15 pu 0.45 pu 0.05 pu 0.25 pu 0.15 pu 0.45 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which one of the following relays has the capability of anticipating the possible major fault in a transformer? Differential relay Over fluxing relay Buchholz relay Over current relay Differential relay Over fluxing relay Buchholz relay Over current relay ANSWER DOWNLOAD EXAMIANS APP
Power Systems A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be PG1 = 150 MW and PG2 = 100 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems If a 500 MVA, 11 kV 3-phase generator at 50 Hz feeds through a transfer impedance of (0+j0.605) Ω/phase, an infinite voltage also at 11 kV, then the maximum steady state power transfer on the base of 500 MVA and 11 kV is 0.5 pu 0.8 pu 1 pu 0.4 pu 0.5 pu 0.8 pu 1 pu 0.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following plants is/are base load plants run off river pump storage nuclear both 1 and 2 run off river pump storage nuclear both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
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