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Power Systems

Power Systems
For large plants of capacity for more than 15 MW, what type of cooling is used

  Liquid.
  Hydrogen.
  Water.
  Air.

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Power Systems
An ACSR conductor has internal inductance 0.05 mH/Km for µr = 1. If this ACSR is replaced with another having µr = 2, then find the internal inductance?

 0.05 mH/Km
 0 mH/Km
 0.025 mH/Km
 0.1 mH/Km

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

 350 Amp.
 200 Amp.
  250 Amp.
 300 Amp.

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 2000
 0.4
 5
 0.22

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Power Systems
Alternate formation and breakage of bubbles are called

  water hamming.
  cavitations.
All of these
  surgfication.

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Power Systems
For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

 this must be a short line
 this expression is true for any line
None of these
 this may either be a medium line or short line

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