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Power Systems

Power Systems
Location of a surge tank, in an hydro electric power station is near

 tail race.
  turbine.
 reservoir.
 dam.

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Power Systems
A transmission line has (2 + j4)Ω impedance, 100 MVA and base voltage is 10 KV. Find the per unit impedance value of transmission line?

 (2 + j4 ) pu
 (0.5 + j1 ) pu
 (1 + j2 ) pu
 (4 + j8 ) pu

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Power Systems
A 3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

 49 kVA.
 70 kVA.
  89.22 kVA.
  35 kVA.

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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?

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

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Power Systems
Stock bridge dampers are used to

All of these
 increase the sag
 reduce the tension
 reduce the vibrations at the point of support

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Power Systems
Which of following power plants will take long period in erection and installation

 Thermal.
 Hydro Power Plant
 Gas turbine.
 Nuclear.

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