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Power Systems

Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 1
 0.882
 1.13
 0.93

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Power Systems
Highest pressure generating pump inside the thermal plant is

 low pressure heater
All of these
 boiler feed pump
 high pressure heater

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Power Systems
Which of the following is/are advantages of N-R method?

 both 1 and 2
 Applicable for large power system network
 Time taken for each iteration is less
 Number of iterations are less

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 5
 2000
 0.22
 0.4

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Power Systems
Mho relay is used for the protection of

 medium length lines.
 no length criterion.
  long transmission lines.
 short length lines.

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Power Systems
If we increase the spacing between the phase conductors, the value of line inductance

 increase
 decrease
 remains unaffected
None of these

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