Power Systems The insulation of the modern EHV lines is designed based on R × I. the lighting voltage. corona. the switch voltage. R × I. the lighting voltage. corona. the switch voltage. ANSWER DOWNLOAD EXAMIANS APP
Power Systems When a transformer is loaded, the secondary terminal voltage gains. That means power factor is leading. zero. unity. lagging. leading. zero. unity. lagging. ANSWER DOWNLOAD EXAMIANS APP
Power Systems What is the approximate efficiency of a normal thermal power station? 20-25% 30-40% 60-70% 45-55% 20-25% 30-40% 60-70% 45-55% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is 1.093 mH 1.182 mH 1.232 mH 1.043 mH 1.093 mH 1.182 mH 1.232 mH 1.043 mH ANSWER DOWNLOAD EXAMIANS APP
Power Systems Find the number of insulator discs required in string insulator, if operating voltage is 220 kV and maximum voltage of each disc is 11 kV? 20 13 21 10 20 13 21 10 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Frequencies must be same in which of the following line to exchange the power from one place to other place ? Synchronous line both 1 and 2 Asynchronous line No need of same frequency for exchange of power Synchronous line both 1 and 2 Asynchronous line No need of same frequency for exchange of power ANSWER DOWNLOAD EXAMIANS APP
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