Power Systems What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system? Vacuum CB Air blast CB Bulk oil type CB Sulphur hexafluoride CB Vacuum CB Air blast CB Bulk oil type CB Sulphur hexafluoride CB ANSWER DOWNLOAD EXAMIANS APP
Power Systems A generator has a rating of 10 MVA, 5 kV has a reactance of 0.02 pu. Find the reactance at a new base values of 50 MVA, 10 kV? 0.02 0.25 0.05 0.025 0.02 0.25 0.05 0.025 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees 2000 5 0.22 0.4 2000 5 0.22 0.4 ANSWER DOWNLOAD EXAMIANS APP
Power Systems Operator "a" rotates a vector anti clock wise direction clock wise direction either 1 or 2 nether 1 nor 2 anti clock wise direction clock wise direction either 1 or 2 nether 1 nor 2 ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 100 MVA alternator operating at full load at 50 Hz. H = 4 MWsec/MVA, Td = 0.5 sec. One of the transmission line is tripped. So that output of generator is reduced to 70 MW. Find the frequency deviation during this time? 0.92 -0.56 0.56 -0.92 0.92 -0.56 0.56 -0.92 ANSWER DOWNLOAD EXAMIANS APP
Power Systems In coal fired thermal power stations, what are the electrostatic precipitators used for? All of these To remove dust particles setting on the bus bar conductors in the station switch yard To keep the air heaters clean To collect the dust particles from the flue gases All of these To remove dust particles setting on the bus bar conductors in the station switch yard To keep the air heaters clean To collect the dust particles from the flue gases ANSWER DOWNLOAD EXAMIANS APP
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