Power Systems In Rankine cycle, the work output from a turbine is given by change of enthalpy between inlet and outlet. change in temperature between inlet and outlet. change in internal energy between inlet and outlet. change of entropy between inlet and outlet. change of enthalpy between inlet and outlet. change in temperature between inlet and outlet. change in internal energy between inlet and outlet. change of entropy between inlet and outlet. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following faults is/are treated as external faults? Over voltage Failure of prime mover of the generator All of these Failure of excitation Over voltage Failure of prime mover of the generator All of these Failure of excitation ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generating station which has a high investment cost and low operating cost is usually operated as a None of above. Base load station. Minimum load station. Peak load station. None of above. Base load station. Minimum load station. Peak load station. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Condition for maximum voltage regulation tanφ = X/R cosφ = R/X cosφ = X/R tanφ = R/X tanφ = X/R cosφ = R/X cosφ = X/R tanφ = R/X ANSWER DOWNLOAD EXAMIANS APP
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 36 kV 45 kV 32 kV 40 kV 36 kV 45 kV 32 kV 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 50 Hz -0.52 Hz 0.52 Hz 0.48 Hz 50 Hz -0.52 Hz ANSWER DOWNLOAD EXAMIANS APP
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