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Power Systems

Power Systems
Normally Z bus matrix is a

 unit matrix
 null matrix
 sparse matrix
 full matrix

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Power Systems
The term self GMD is used to calculate

 capacitance
 both 1 and 2
 inductance
 resistance

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Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 six
 two
 one
 three

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Power Systems
For 800 MJ stored energy in the rotor at synchronous speed, what is the inertia constant H for a 50 Hz, four pole turbo generator rated 100 MVA, 11 kV?

 4 MJ/MVA
 8 MJ/MVA
 6 MJ/MVA
 2 MJ/MVA

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Power Systems
Graphite is use din nuclear plant as a / an

 fuel.
 coolant.
  moderator.
 electrode.

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Power Systems
The unit protection scheme provides

 remote protection.
  primary protection.
 simultaneous protection.
 back up protection.

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