Power Systems Maximum efficiency of modern coal fired steam raising thermal power plants is restricted to about 035 (a low value), mainly because of high energy loss from turbine exhaust to condenser. low steam turbine mechanical efficiency. low alternative efficiency. high energy loss in boiler. high energy loss from turbine exhaust to condenser. low steam turbine mechanical efficiency. low alternative efficiency. high energy loss in boiler. 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 1 pu 0.8 pu 0.4 pu 0.5 pu 1 pu 0.8 pu 0.4 pu 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? 88.2% 15% 85% 11.8% 88.2% 15% 85% 11.8% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following buses is/are not PV buses? fixed shunt capacitor buses voltage control buses reactive power support buses both 1 and 2 fixed shunt capacitor buses voltage control buses reactive power support buses both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A gas turbine power plant is best suited for Base load. Emergency. Peak load. None of these. Base load. Emergency. Peak load. None of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems In boiler water reactor (BWR) enriched uranium is used as fuel. all of above. there is danger of radioactive contamination of steam. the feed water acts both coolant and a moderator. enriched uranium is used as fuel. all of above. there is danger of radioactive contamination of steam. the feed water acts both coolant and a moderator. ANSWER DOWNLOAD EXAMIANS APP
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