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Power Systems

Power Systems
The amount of ash content in Indian coal

  60 %.
  45 %.
 35 %.
 20 %.

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 83.76 kV
 48.36 kV
 52.84 kV
 20 kV

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Power Systems
In which of the following transmission lines capacitance effect is negligible?

 shoart transmission lines
 long transmission lines
 both 1 and 3
 medium transmission lines

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Power Systems
In a 400 KV network, 360 KV is recorded at a 400 KV bus. The reactive power absorbed by shunt rated for 50 MVAr, 400 KV connected at the bus is

 55.56 MVAr.
 45 MVAr.
 61.73 MVAr.
  40.5 MVAr.

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Power Systems
Stability of a transmission line can be increased by

 shunt reactor
 series capacitor
 both 1 and 2
 shunt capacitor

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Power Systems
Which of the following is/are the effects of corona

All of these
 power loss decreases
 interference decreases
 charging current increases

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