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Power Systems

Power Systems
Fault calculations using computer are usually done by

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

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Power Systems
Pipes carrying steam are generally of

  steel.
 cast iron.
 cobalt.
 aluminium.

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Power Systems
Corona is accompanied by

 violet visible light
 power loss and interference
 hissing sound
All of these

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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?

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

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Power Systems
The skin effect of conductor will increase when

 diameter decrease
 resistivity decrease
 frequency decrease
All of these

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Power Systems
The most suitable circuit breaker for short line fault without switching resistor is

 oil circuit breaker.
  SF6 breaker.
 air blast circuit breaker.
 none of these.

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