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Power Systems

Power Systems
Find the value of a729, where "a" is the operator

 0
 α
 1
 α²

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Power Systems
Power transmission lines are transposed to reduce

 radio interference
 skin effect
 proximity effect
 ferranti effect

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Power Systems
Mercury is choice with steam in binary vapor cycle because

 higher critical temperature and pressure.
  all of above.
 higher saturation temperature than other fluids.
 relative low vaporization pressure.

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Power Systems
Condition for zero voltage regulation is

 cosφ = R/X
 tanφ = R/X
 cosφ = X/R
 tanφ = X/R

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Power Systems
Which of the following faults is/are treated as external faults?

All of these
 Failure of excitation
 Failure of prime mover of the generator
 Over voltage

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Power Systems
Rating of fuse wire is expressed in

  Watts.
  Mho.
  Ampere.
 ÃŽÂ©.

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