Power Systems Which of the following statements is/are true? Corona is reduced by decreasing the supply frequency All of these increasing the radius of the conductor increasing the distance between the conductor decreasing the supply frequency All of these increasing the radius of the conductor increasing the distance between the conductor ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the fault is very nearer to the generator, the fault current is any of the above zero less larger any of the above zero less larger ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu? 0.2 pu 3.975 pu 2.4 pu 1.375 pu 0.2 pu 3.975 pu 2.4 pu 1.375 pu 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 The main objectives of electrical power transmission is/are Transmission system must be more efficient with minimum line losses both 1 and 2 Voltage regulation of the transmission line must be zero or minimum nether 1 nor 2 Transmission system must be more efficient with minimum line losses both 1 and 2 Voltage regulation of the transmission line must be zero or minimum nether 1 nor 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Reactance relays are used for the protection of long transmission lines only short transmission lines only medium transmission lines only All of these long transmission lines only short transmission lines only medium transmission lines only All of these ANSWER DOWNLOAD EXAMIANS APP
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