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Power Systems

Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.4 pu
 0.2 pu
 0.1 pu
 0.5 pu

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Power Systems
String efficiency depends upon

  all of these.
 no. of SCR in the string.
 voltage rating of whole string.
 voltage rating of one SCR.

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Power Systems
In hydro power stations what is an enlarged body of water just above the intake and used as a regulating reservoir called

 Spillways.
 Penstock.
  Fore bay.
 Reservoir.

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Power Systems
A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

 medium transmission line
 any of the above
 long transmission line
 short transmission line

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Power Systems
A thermal power plant is being supplied with coal having much more ash content than that for which it was designed. Which of its following units needs major modifications

 Condenser.
 Pulversing unit.
 Ash handling unit.
 Cooling tower.

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Power Systems
Attenuation occurs due to

 both 1 and 3
 inductance
 conductance
 resistance

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