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Power Systems

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

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

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Power Systems
The commercial sources of energy are

  fossile fuels and radioactive substances.
 wood, animal wastes and agricultural wastes.
 solar, wind, biomass.
 none of above.

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Power Systems
For a lossy transmission line, the characteristic impedance does not depend on

 The operating frequency of the line.
 The load terminating the line.
 The conductivity of conductors.
 The permittivity of the dielectric separating the conductor.

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Power Systems
Graphite is use din nuclear plant as a / an

 fuel.
 electrode.
 coolant.
  moderator.

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Power Systems
Which power plant cannot have single unit of 100 MW capacity

 Steam power plant.
  Diesel engine plant.
 Hydro electric power plant.
 Nuclear power plant.

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Power Systems
String efficiency depends upon

 no. of SCR in the string.
 voltage rating of one SCR.
 voltage rating of whole string.
  all of these.

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