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Power Systems

Power Systems
Operating time of pumped storage plant is

 very high
 can't say
 high
 low

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Power Systems
Find the number of strands of ACSR conductor for 4 layer transmission line?

 1
 7
 29
 37

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Power Systems
What type of back up protection is used for alternators?

  Buchholz relay.
  Impedance relay.
  IDMT relay.
  Mho relay.

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

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Power Systems
Which of the following matrix is used for load flow studies?

 null matrix
 Unit matrix
 Y bus matrix
 Z bus matrix

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