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Power Systems

Power Systems
Which of the following plants is/are base load plants

 pump storage
 run off river
 both 1 and 2
 nuclear

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Power Systems
Main bus bar protection scheme is /are

  both fault bus and differential protection.
  differential protection.
  fault bus protection.
  none of these.

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Power Systems
The voltage and current instantaneous values are given as 5 sin (ωt + 30°) pu and 2 sin (ωt - 15°) pu respectively. Find the per unit active power?

 3.535 pu
 5 pu
 7 pu
 5.353 pu

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Power Systems
A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

 0.707 leading
 unity
 0 leading
 0.5

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Power Systems
For accurate load flow calculations on large power systems, the best method is

 N-R method
 G-S method
All of these
 Decoupled method

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 6
 2
 10
 16

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