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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
 0.4
 0.25

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Power Systems
A 3 - Φ, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3 s. The symmetrical breaking current is

 104.8 kA.
 1200 A.
  35 kA.
 3600 A.

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Power Systems
Which of the following statements is/are true? In case of parallel transmission lines

 fault current reduces
 both 1 and 3
 fault current increases
 stability increases

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Power Systems
Which of the following transmission line is most practically used in load flow analysis?

 Nominal ∏
 Nominal T
 either 1 or 2
 nether 1 nor 2

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Power Systems
In which of the following given faults, all the sequence currents are equal?

 LLG
 LL
 LLL
 LG

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 15 MJ/MVA
 10.5 MJ/MVA
 2.5 MJ/MVA
 6 MJ/MVA

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