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Power Systems

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

 1
 1.25
 0.89
 1.13

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Power Systems
Resistance switching in normally employed in

 minimum oil breakers.
 bulk oil breakers.
 all breakers.
  air blast circuit breaker.

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Power Systems
Find the characteristic impedance of a transmission line, if impedance is 16 Ω and admittance is 0.1 mâ„§?

 200 Ω
 400 Ω
 160 Ω
 320 Ω

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Power Systems
Maximum power transfer capability of transmission line can be increased by

 Using bundled conductors
 Parallel transmission lines
 Using series capacitance
All of these

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Power Systems
In a regenerative cycle, feed water is heated by

 heaters.
 all of above.
 exhaust gas.
  drained steam from turbine.

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Power Systems
The conductor carries more current on surface as compared to core. This is called as

All of these
 skin effect
 corona effect
 unsymmetrical fault

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