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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 500 MJ
 10 MJ
 5 MJ
 50 MJ

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Power Systems
Which of the following power plants can generate power at unpredictable or uncontrollable time

 Wind turbine.
 Condenser.
 Pulverising unit.
 Cooling tower.

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt?

 4.68 msec
 2.63 msec
 9.68 msec
 1.47 msec

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Power Systems
Which of the following are the fissile materials

 U238 and Th232.
 U235 and Th239.
 U235, U233 and Pu239.
  None of these.

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Power Systems
If the inertia constant H = 8 MJ/MVA for a 50 MVA generator, the stored energy is

 400 MJ
 200 MJ
 8 MJ
 50 MJ

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Power Systems
A pin type insulator has 100 kV puncture voltage. If 10 kV flash over voltage occurred in a transmission line, then find the safety factor of insulator?

 0.1
 10
 0.001
 1000

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