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Power Systems

Power Systems
For load flow studies, What are the quantities specified at load bus are

 δ and Q
 V and δ
 P and V
 P and Q

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Power Systems
An isolated synchronous generator with transient reactance equal to 0.1 pu on a 100 MVA base is connected to the high voltage bus through a step up transformer of reactance 0.1 pu on a 100 MVA base. The fault level at the bus is

 400 MVA
 500 MVA
 200 MVA
 100 MVA

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Power Systems
The function of reflector is to

 stop the chain reaction.
 reduce the speed of the neutrons.
 none of above.
  bounce back most of the neutrons that escape from the fuel core.

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Power Systems
A 100 Km long transmission line is loaded at 110 kV. If the loss of line is 5 MW and the load is 150 VA the resistance of the line is

 2.26 Ω / phase.
 4.65 Ω / phase.
  8.06 Ω / phase.
 6.06 Ω / phase.

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Power Systems
In a steam power plant, the feed water coming to the economizer is heated plant the feed water coming to the economizer is heated using

 HP steam.
  flue gas.
 direct heat in the furnace.
 LP steam.

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 secs. The symmetrical breaking current is

 45 kA.
 50 kA.
 55 kA.
  35 kA.

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