Power Systems A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage? 40 kV 45 kV 32 kV 36 kV 40 kV 45 kV 32 kV 36 kV 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? 11.8% 15% 88.2% 85% 11.8% 15% 88.2% 85% ANSWER DOWNLOAD EXAMIANS APP
Power Systems In thermal power stations, economiser will reduce the thermal efficiency increase the thermal efficiency both 2 and 3 reduce the heat reduce the thermal efficiency increase the thermal efficiency both 2 and 3 reduce the heat ANSWER DOWNLOAD EXAMIANS APP
Power Systems Surge impedance loading of a transmission line can be increased by increasing its voltage level both 1 and 3 addition of lumped inductance in parallel addition of lumped capacitance in series increasing its voltage level both 1 and 3 addition of lumped inductance in parallel addition of lumped capacitance in series ANSWER DOWNLOAD EXAMIANS APP
Power Systems The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor? 25% 62.5% 75% 50.5% 25% 62.5% 75% 50.5% ANSWER DOWNLOAD EXAMIANS APP
Power Systems Critical mass is a mass of fissionable material required to stop a chain reaction. none of these. maximum mass of fissionable material required to sustain a chain reaction. minimum mass of fissionable material required to sustain chain reaction. a mass of fissionable material required to stop a chain reaction. none of these. maximum mass of fissionable material required to sustain a chain reaction. minimum mass of fissionable material required to sustain chain reaction. ANSWER DOWNLOAD EXAMIANS APP
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