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Power Systems

Power Systems
For symmetrical network, the neutral current is

 maximum
 any of the above
 zero
 infinity

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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

 55.1.
  5.
 20.
 10.

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

 fuel.
  moderator.
 electrode.
 coolant.

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Power Systems
In case of failure of prime mover of the generator, which type of relay is used?

 reverse power relay
 distance relays
 offset mho relay
 impedance relay

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Power Systems
Plug setting of a relay can be altered by varying

 none of these.
 air gap of magnetic path.
 no. of ampere-turns.
 adjustable back up stop.

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Power Systems
The unit protection scheme provides

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

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