Power Systems
On what factor does the performance of a circuit breaker depend?

 Critical length of breaking.
  Breaking speed.
  None of these.
  Both A and C.

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Power Systems
Gas coolled reactor

  both B and C.
 use heavy water as coolant as well as moderator.
 use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.
 use CO2. or helium as coolant and graphite the moderator.

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