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Power Systems

Power Systems
In kaplan runner, the number of blades is generally of the order of

  3 - 6.
  16 - 24.
 12 - 16.
 1 - 2.

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 6 MJ/MVA
 2.5 MJ/MVA
 10.5 MJ/MVA
 15 MJ/MVA

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Power Systems
Positive, negative and zero sequence impedances of line are 2,2 and 5 pu respectively. Find self and mutual impedances respectively?

 2 and 2 pu
 1 and 3 pu
 3 and 1 pu
 2 and 5 pu

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Power Systems
Reactance relays are used for the protection of

 long transmission lines only
All of these
 medium transmission lines only
 short transmission lines only

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

 shunt reactor
 both 1 and 2
 shunt capacitor
 series capacitor

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Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

 25.8 mH.
 23.33 mH.
 21.2 mH.
  23.8 mH.

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