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Power Systems

Power Systems
If sparsity of a 5 bus transmission line is 0.4. Find the number of transmission lines?

 4
 3
 5
 6

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Power Systems
Which of the following relays is/are unit protection relays?

 Buccholz relays
 both 1 and 2
 Differential relays
 over current relays

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Power Systems
Range of accelerating factor is

 10.8 to 11.2
 1 to 10
 1.6 to 1.8
 50 to 100

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Power Systems
The line current IR flowing into balanced delta connected load is - j5 - 3 A. If the phase sequence is RYB the phase current IYB is

  5.
 55.1.
 10.
 20.

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Power Systems
The rating of fuse wire is always expressed in

  ampere-hours.
  ampere-volts.
  amperes.
  kWh.

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

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

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