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Power Systems

Power Systems
Proximity effect is more in case of

 over head lines
 power cables
 same in both cases
None of these

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Power Systems
Find the relation between sub transient (X"), transient (X') and synchronous reactance (X) ?

 X" < X' < X
 X" > X' >X
 X" < X' > X
 X" > X' < X

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Power Systems
By using guard ring in a transmission line, its string efficiency

 decrease
 remains unaffected
 increase
None of these

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Power Systems
String chart is drawn between

 T on Y-axis and S and T on on X-axis
 nether 1 nor 2
 temperature (T) on X- axis, sag(S) and tension (T) on Y-axis
 both 1 and 2

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Power Systems
Isolator in sub station is open under ------------- condition?

 short circuit
 no load
 any of the above
 full load

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Power Systems
The function of draft tube is reaction turbine is to

 reduce water hammer.
 increase flow rate of water.
  convert kinetic energy of water.
 all of above.

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