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Power Systems

Power Systems
Which material is used in controlling chain reaction in a nuclear reactor

 Thorium.
 Beryllium.
 Heavy water.
  Boron.

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Power Systems
What is the correct expression for the electrical power developed by

 ( 75 / 0.736 ) × WQHη.
 ( 7 / 75 ) × WQHη.
  ( 0.763 / 75 ) × WQHη.
 75 × 0.736 × WQHη.

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Power Systems
The power output from an hydroelectric plants depend on

  discharge, system efficiency.
 type of dam, head, system efficiency.
 type of turbine, type of dam and type of catchment area.
 type of dam, type of catchment area and discharge.

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Power Systems
Critical mass of the fuel is the amount required to make the multiplication factor

  equal to factor.
 less than 1.
 0.5.
 more than 1.

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

 Doubled.
  Increase but does not doubled.
 Halves.
 Decrease but does not halves.

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Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 5 pu
 0.2 pu
 0.25 pu
 1 pu

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