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Power Systems

Power Systems
The ratio of reset to pick up current for an induction cup relay is approximately

 0.75.
 1.0.
  0.99.
 1.35.

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Power Systems
A hydro power plant of run off river type should be provided with pondage so that the

  firm capacity of plant is increased.
 pressure inside the turbine casing remains.
 operating head is controlled.
 kinetic energy of the running water is fully utilized.

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Power Systems
Tarapur nuclear power plant has which type of reactor?

 None of these.
 Pressurized water reactors.
 Boiling water type.
 CANDU type reactors.

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Power Systems
A 200 MVA alternator operated at no load at frequency of 50 Hz, it has inertia constant of 5 MWsec/MVA and governing system has a time delay of 0.6 sec. If the load of 50 MW is suddenly applied then find the frequency deviation during this time?

 0.76 Hz
 -0.76 Hz
 0.85 Hz
 -0.85 Hz

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Power Systems
Which of the following statement is/are true regarding infinite line?

 It has infinite voltage
 both 2 and 3
 It has infinite length
 It maintains the constant voltage

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.4 pu
 0.1 pu
 0.5 pu
 0.2 pu

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