Power Systems Which of the following will take least time in starting from cold condition to full load operation Gas turbine plant. Thermal power plant. Nuclear power plant. Hydro electric power plant. Gas turbine plant. Thermal power plant. Nuclear power plant. Hydro electric power plant. ANSWER DOWNLOAD EXAMIANS APP
Power Systems An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is 4.28 pu 7.25 pu 3.75 pu 2.5 pu 4.28 pu 7.25 pu 3.75 pu 2.5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base? 1 pu 5 pu 0.25 pu 0.2 pu 1 pu 5 pu 0.25 pu 0.2 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Surge impedance loading (SIL) is represented by Vl²/Zs both 1 and 2 Vph²/Zs Vl²*√(C/L) Vl²/Zs both 1 and 2 Vph²/Zs Vl²*√(C/L) ANSWER DOWNLOAD EXAMIANS APP
Power Systems In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system? 1 0.5 0.25 0.75 1 0.5 0.25 0.75 ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 85% 15% 88.2% 11.8% 85% 15% 88.2% 11.8% ANSWER DOWNLOAD EXAMIANS APP
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