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Power Systems

Power Systems
A 3 layer, total diameter of an ACSR conductor is 5 cm. Find the diameter of each strand?

 15 cm
 1.5 cm
 1 cm
 5 cm

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Power Systems
The inductance of single phase two wire line is given by

 4×10-7× ln(d/r') H/m
 0.4×10-7× ln(d/r') H/m
 4×10-7× ln(r'/d) H/m
 0.4×10-7× ln(r'/d) H/m

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 10
 16
 6
 2

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Power Systems
Merze price current scheme protection is used in

  both A and B.
  alternator.
  transformer.
  bus bars.

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Power Systems
The total number of strands in a ACSR conductor are 7, then find the layer number?

 5
 3
 7
 2

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

 350 Amp.
  250 Amp.
 200 Amp.
 300 Amp.

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