Power Systems A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is 23.9 38.6 35.45 31.7 23.9 38.6 35.45 31.7 ANSWER DOWNLOAD EXAMIANS APP
Power Systems In transmission lines distribution constants are inductance and resistance both 1 and 2 resistance inductance and capacitance inductance and resistance both 1 and 2 resistance inductance and capacitance ANSWER DOWNLOAD EXAMIANS APP
Power Systems For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence, this may either be a medium line or short line this must be a short line this expression is true for any line None of these this may either be a medium line or short line this must be a short line this expression is true for any line None of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems Lightning arresters are used to protect electrical equipment against over voltages due to indirect lightning stroke. over currents due to lightning stroke. power frequency of over voltages. direct strokes of lightning. over voltages due to indirect lightning stroke. over currents due to lightning stroke. power frequency of over voltages. direct strokes of lightning. 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? 0.48 Hz 50 Hz 0.52 Hz -0.52 Hz 0.48 Hz 50 Hz 0.52 Hz -0.52 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems In Francis turbine runner, the number blades is usually of the order of 12 - 14. 3 - 6. 16 - 24. 6 - 8. 12 - 14. 3 - 6. 16 - 24. 6 - 8. ANSWER DOWNLOAD EXAMIANS APP
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