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Power Systems

Power Systems
Percentage of carbon is highest in

  lignite coal.
  bituminous coal.
  anthracite coal.
  coal gas.

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Power Systems
In a nuclear reactor, chain reactor is controlled by introducing

 brass rods.
  cadmium rods.
 graphite rods.
 iron rods.

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Power Systems
A three phase, 33 kV oil circuit breaker is rated 1200 A, the symmetrical breaking capacity is 2000 MVA, 3 secs. Then the making capacity is

  5000 MVA.
 5200 MVA.
 5500 MVA.
  5100 MVA.

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Power Systems
The total number of strands(N) is concentrically stranded cable with total annular space filled with strands of uniform diameter is given by (if x is number of layers)

 N = 3x²+3x+1
 N = 3x²-6x+1
 N = 3x²-3x+1
 N = 3x²-2x+1

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Power Systems
Breaking current is a ------------------ value?

 maximum
 any of the above
 RMS
 average

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Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

 49 kVA.
  89.22 kVA.
 70 kVA.
  35 kVA.

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