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Power Systems

Power Systems
For 66 kV lines the number of insulator discs of each 11 kV used are

 12
 6
 5
 3

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Power Systems
Thermal shielding is provided to

All of these
 absorb the fast neutron.
 protected the operating personal from exposure to radiations.
 prevent the reactor wall from getting heated.

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Power Systems
The Gauss Seidel load flow method has following disadvantages. Which of the following statement is wrong?

 Unreliable convergence
 Choice of slack bus affects the convergence
 A good initial guess for voltages is essential for convergence
 Slow convergence

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Power Systems
Which of the following relays is/are unit protection relays?

 Differential relays
 over current relays
 both 1 and 2
 Buccholz relays

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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

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

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Power Systems
Which of the following transformer is used in sub station for operating a protective relay?

 auto transformer
All of these
 distribution transformer
 capacitor voltage transformer

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