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Power Systems

Power Systems
A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix?

 0.75
 0.5
 0.25
 0.4

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Power Systems
Which of the following circuit breakers produce least arc energy?

 Plain oil CB.
  Air blast CB.
 Air break CB.
 Minimum oil CB.

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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
 1
 0.75

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Power Systems
Which of following power plants is free from environmental problem

 Nuclear.
  Hydroelectric.
 Steam.
 Diesel engine.

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Power Systems
Resistance switching in normally employed in

 all breakers.
 minimum oil breakers.
  air blast circuit breaker.
 bulk oil breakers.

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Power Systems
Critical visual voltage is the voltage at which

 both 1 and 2
 corona is visible with blue or violet colour
 corona is just initiated
None of these

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