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Power Systems

Power Systems
Length of short transmission line is up to

 any of the above
 80 km
 150 km
 40 km

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Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.8 lag and 0.8 lead
 0.8 lag and 0.6 lead
 0.6 lag and 0.8 lead
 0.6 lag and 0.6 lead

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Power Systems
Which of following materials can be used as coolant

 CO2.
  Any of above.
 Helium.
 Heavy water.

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Power Systems
A hydroelectric power station is commonly found in

 desert areas.
 grasslands.
  hilly areas.
 swamps.

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Power Systems
As the frequency of the system is increased, the charging MVAR

 increases
 decreases
None of these
 remains unaffected

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Power Systems
A 3 - Φ, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

 3600 A.
  35 kA.
 1200 A.
 104.8 kA.

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