Power Systems A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is 200 Ω 800 Ω 0 Ω 400 Ω 200 Ω 800 Ω 0 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of following generating plants has the minimum operating cost Nuclear plant. Hydroelectric plant. Diesel plant. Steam plant. Nuclear plant. Hydroelectric plant. Diesel plant. Steam plant. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant? 6000 kW 3750 kW 7500 kW 3000 kW 6000 kW 3750 kW 7500 kW 3000 kW ANSWER DOWNLOAD EXAMIANS APP
Power Systems The voltage and current instantaneous values are given as 5 sin (ωt + 30°) pu and 2 sin (ωt - 15°) pu respectively. Find the per unit active power? 3.535 pu 5.353 pu 5 pu 7 pu 3.535 pu 5.353 pu 5 pu 7 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems For a fixed value of complex power flow in a transmission line having a sending end voltage V, the real power loss will be proportional to V. V2. 1 / V. 1 / V2. V. V2. 1 / V. 1 / V2. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected? 15% 88.2% 11.8% 85% 15% 88.2% 11.8% 85% ANSWER DOWNLOAD EXAMIANS APP
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