Power Systems Lightning arresters are used to protect electrical equipment against power frequency of over voltages. over currents due to lightning stroke. over voltages due to indirect lightning stroke. direct strokes of lightning. power frequency of over voltages. over currents due to lightning stroke. over voltages due to indirect lightning stroke. direct strokes of lightning. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following relationships are not valid for short transmission lines B = C = Z A = D = 1 Is = Ir All of these B = C = Z A = D = 1 Is = Ir All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems What should be the minimum depth (in metre)of cable trench to dug for laying of 1.1 kV? 1.20. 1.05. 0.75. 0.90. 1.20. 1.05. 0.75. 0.90. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Where the voltage is high and current to be interrupted is low, Which of following the breaker is preferable? Oil CB. Air blast CB. Vacuum CB. Any of these. Oil CB. Air blast CB. Vacuum CB. Any of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems India 1st nuclear plant was set up at Bhaba. Tarapur. Rana pratap sagar. Kalpakkam. Bhaba. Tarapur. Rana pratap sagar. Kalpakkam. ANSWER DOWNLOAD EXAMIANS APP
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 350 kV 500 kV 600 kV 400 kV 350 kV 500 kV 600 kV ANSWER DOWNLOAD EXAMIANS APP
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