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Power Systems

Power Systems
Condition for zero voltage regulation is

 tanφ = X/R
 cosφ = X/R
 tanφ = R/X
 cosφ = R/X

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Power Systems
Which of the following represents the sag(S) of a transmission line?

 S = wl²/16T
 S = wl²/8T
 S = wl²/2T
 S = wl²/4T

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Power Systems
Which of the following statement is/are true regarding infinite line?

 It maintains the constant voltage
 It has infinite voltage
 It has infinite length
 both 2 and 3

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

All of these
 Quick response to load variation.
 Low capital cost.
 Capability of quick starts.

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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
The annual depreciation of hydro power plant is about

  0.5 - 1.5 %.
 10 - 15 %.
 15 - 20 %.
 20 - 25 %.

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