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Power Systems

Power Systems
Fault calculations using computer are usually done by

 Y bus method
 Z bus method
 either 1 or 2
None of these

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Power Systems
Breaking current is a ------------------ value?

 maximum
 RMS
 average
 any of the above

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

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

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Power Systems
In which of the following transmission lines capacitance effect is negligible?

 shoart transmission lines
 both 1 and 3
 medium transmission lines
 long transmission lines

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Power Systems
A loss less transmission line has a length of 600 km, find the phase shift of voltage signal?

 90°
 42°
 36°
 45°

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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.
  35 kVA.
  89.22 kVA.

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