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Power Systems

Power Systems
Cheapest plant in operation and maintenance is

  nuclear.
  hydroelectric.
  diesel power.
  steam power.

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Power Systems
If sag in an overhead line increase, tension in the line

 remains same
None of these
 decrease
 increase

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Power Systems
Fault calculations using computer are usually done by

None of these
 either 1 or 2
 Z bus method
 Y bus method

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Power Systems
In relay coil which is used?

  Current transformer.
  Power transformer.
  Instrument transformer.
  Potential transformer.

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Power Systems
Steady state stability of a power system is improved by

 using double circuit line instead of single circuit line
 decreasing generator inertia
 single pole switching
All of these

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Power Systems
The capacitance of an overhead transmission line increases with

 increase in height of conductors above ground
 increase in mutual geometrical mean distance
 neither 1 nor 2
 both 1 and 2

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