Power Systems In coal fired thermal power stations, what are the electrostatic precipitators used for? To remove dust particles setting on the bus bar conductors in the station switch yard To collect the dust particles from the flue gases To keep the air heaters clean All of these To remove dust particles setting on the bus bar conductors in the station switch yard To collect the dust particles from the flue gases To keep the air heaters clean All of these ANSWER DOWNLOAD EXAMIANS APP
Power Systems If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs. 20. 7. 5. 3. 20. 7. 5. 3. ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 125 electrical degrees/s² 225 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which one of the following relays has the capability of anticipating the possible major fault in a transformer? Over current relay Differential relay Over fluxing relay Buchholz relay Over current relay Differential relay Over fluxing relay Buchholz relay 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? 1.375 pu 3.975 pu 0.2 pu 2.4 pu 1.375 pu 3.975 pu 0.2 pu 2.4 pu ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statement is/are true regarding infinite line? It maintains the constant voltage It has infinite length It has infinite voltage both 2 and 3 It maintains the constant voltage It has infinite length It has infinite voltage both 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
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