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Power Systems

Power Systems
Range of accelerating factor is

 50 to 100
 10.8 to 11.2
 1.6 to 1.8
 1 to 10

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

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

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Power Systems
In which of the following frequency control method tie line may be overloaded?

All of these
 parallel frequency
 flat tie line control
 flat frequency control

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Power Systems
Ships are usually supplied power by

 None of above.
 Steam accumulator.
  Diesel engine.
 Hydraulic turbine.

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Power Systems
Which of the following is/are the effects of corona

 power loss decreases
 interference decreases
All of these
 charging current increases

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Power Systems
The main objectives of electrical power transmission is/are

 both 1 and 2
 Voltage regulation of the transmission line must be zero or minimum
 Transmission system must be more efficient with minimum line losses
 nether 1 nor 2

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