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Power Systems

Power Systems
In thermal power plants the size of coal after crushing

  300 mm.
  20 - 25 mm.
 40 mm.
 200 - 205 mm.

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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?

 1000
 10
 0.1
 0.001

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Power Systems
Equal area criterion gives the information regarding

 stability region
 relative stability
 swing curves
 absolute stability

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Power Systems
If the rated receiving end voltage is 33 kV, then what are the limits for safe operation of equipments?

 33 to 50 kV
 any voltage above 33 kV
 31.35 to 34.65 kV
 25 to 35 kV

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Power Systems
A power station has a maximum demand of 15 MW. The plant capacity is 20 MW. Find the reserve capacity of the plant?

 5 MW
 15 MW
 10 MW
 20 MW

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Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/5. The plug setting multiplier for a fault current of 5 kA is

 6
 8
 5
 2

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