Power Systems The ABCD constants of a 3-phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° ℧. The sending end voltage is 400 kV. The receiving end voltage under no load condition is 400 kV 500 kV 600 kV 350 kV 400 kV 500 kV 600 kV 350 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following is/are the methods of improving transient stability? Fast acting governing system Fast acting excitation control All of these Dynamic breaking Fast acting governing system Fast acting excitation control All of these Dynamic breaking ANSWER DOWNLOAD EXAMIANS APP
Power Systems If sag in an overhead line increase, tension in the line remains same decrease None of these increase remains same decrease None of these increase ANSWER DOWNLOAD EXAMIANS APP
Power Systems Gross head of an hydroelectric power station is the height of water level in the river where the storage is provided. all of above. the height of water level in the river where the tail race is provided. the difference of water level between the level in storage and tail race. the height of water level in the river where the storage is provided. all of above. the height of water level in the river where the tail race is provided. the difference of water level between the level in storage and tail race. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of following is a medium and low head turbines Kaplan and Francis turbines. Pelton and Kaplan turbines. None of above. Francis and Kaplan turbines. Kaplan and Francis turbines. Pelton and Kaplan turbines. None of above. Francis and Kaplan turbines. 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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