Power Systems For complete protection of 3-phase system from the short circuit faults minimum number of relays required are one six two three one six two three ANSWER DOWNLOAD EXAMIANS APP
Power Systems An alternator having an induced emf of 1.6 pu is connected to an infinite bus of 1 pu. If the bus bar has reactance of 0.6 pu and alternator has reactance of 0.2 pu, what is the maximum power that can be transferred? 2 pu 6 pu 2.67 pu 5 pu 2 pu 6 pu 2.67 pu 5 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems The water from a catchment is 60*106 cu m annually and hydro station has head of 40 m. Assuming ideal generator and turbine, the power that can be theoretically generated is 300 kW 500 kW 250 kW 750 kW 300 kW 500 kW 250 kW 750 kW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Efficiency of thermal power plant can be taken as generator efficiency. turbine efficiency. efficiency of thermal cycle. product of efficiencies of all stages. generator efficiency. turbine efficiency. efficiency of thermal cycle. product of efficiencies of all stages. 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? 50 Hz 0.52 Hz -0.52 Hz 0.48 Hz 50 Hz 0.52 Hz -0.52 Hz 0.48 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which following statement are not true for line parameters R, L, G and C of transmission line LC = μ ε and RG = σ ε. Both R and G depend on the conductivity of conductor forming the line. All of above. G = 1/R where G is conductance of line. LC = μ ε and RG = σ ε. Both R and G depend on the conductivity of conductor forming the line. All of above. G = 1/R where G is conductance of line. ANSWER DOWNLOAD EXAMIANS APP
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