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Power Systems

Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 500 MJ
 5 MJ
 10 MJ
 50 MJ

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Power Systems
The pickup value of relay is 6.5 Amp and fault current in relay coil is 39 Amp. Its plug setting multiplier is

 7 A.
 8 A.
 10 A.
  6 A.

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Power Systems
Which of the following plants has the maximum eapital cost

 Hydro-plants.
 Diesel plants.
 Steam plants.
  Nuclear plants.

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

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

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Power Systems
Inductance of transmission line will decrease when

 both GMD and GMR decrease
 both GMD and GMR increase
 GMD decrease and GMR increase
 GMD increase and GMR decrease

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Power Systems
The ground capacitance existing between transmission line and ground is 4µF. Find the inductive reactance of the peterson coil for compensation of arcing grounds?

 265.25 Ω
 625.35 Ω
 0.844 Ω
 855.26 Ω

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