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Power Systems

Power Systems
Which of following materials can be used as coolant

  Any of above.
 Heavy water.
 Helium.
 CO2.

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Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 0.25
 0.5
 0.75
 1

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Power Systems
What is the function of economiser in steam boilers

 improving thermal efficiency
 collect ash particals
All of these
 cooling

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Power Systems
The rating of fuse wire is always expressed in

  ampere-hours.
  ampere-volts.
  kWh.
  amperes.

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Power Systems
Bundled conductors are used for EHV transmission lines primarily for reducing the

 surge impedance of the line
 corona loss
 voltage drop across the line
 copper loss

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Power Systems
Oxide film arrestor has which of the following properties?

 It is expensive.
 Installed at points of transmission line where daily visit is difficult.
 Does not require daily charging.
 Both A and B.

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