Power Systems The capacitance of an overhead transmission line increases with increase in height of conductors above ground increase in mutual geometrical mean distance both 1 and 2 neither 1 nor 2 increase in height of conductors above ground increase in mutual geometrical mean distance both 1 and 2 neither 1 nor 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A diesel power station has fuel consumption of 0.28 Kg per kWh. The calorific value of fuel is being 10000 KCal / kg. Determine the overall efficiency 40.85 %. 30.7 %. 40 %. 30.26 %. 40.85 %. 30.7 %. 40 %. 30.26 %. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following transformer is used in sub station for operating a protective relay? auto transformer All of these capacitor voltage transformer distribution transformer auto transformer All of these capacitor voltage transformer distribution transformer ANSWER DOWNLOAD EXAMIANS APP
Power Systems Making and breaking currents of 3 phase AC circuit breakers in power system are respectively in what form? RMS and RMS value Instantaneous and RMS value any of the above RMS and Instantaneous value RMS and RMS value Instantaneous and RMS value any of the above RMS and Instantaneous value ANSWER DOWNLOAD EXAMIANS APP
Power Systems Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line? -0.52 Hz 0.48 Hz 0.52 Hz 50 Hz -0.52 Hz 0.48 Hz 0.52 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following decides the insulation level of 400 kV, EHV line? skin effect switching over voltage lighting voltage radio interference skin effect switching over voltage lighting voltage radio interference ANSWER DOWNLOAD EXAMIANS APP