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Power Systems

Power Systems
If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

 3.
 20.
  5.
 7.

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Power Systems
At slack bus, which one of the following combinations of variables is not specified?

 Q and V
 V and δ
 P and V
 P and Q

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Power Systems
The neutral of 10 MVA, 11 kV alternator is earthed through a resistance of 5 ohms. The fault ready is set to operate at 0.75 A. The current transformers have a ratio of 1000/5. What is the percentage of the alternator winding is protected?

 85%
 88.2%
 11.8%
 15%

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Power Systems
Gas turbine power plants for maximum efficient may have

  All of above.
 Reheating.
 Multistage compression.
 Heat exchangers.

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Power Systems
A network containing 100 buses in which 10 are the voltage control buses, 5 are fixed shunt capacitor buses, 20 are the reactive power support buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 163 × 163
 164 × 164
 162 × 162
 165 × 165

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Power Systems
In a transmission line the insulators to be used at the dead end or sharp curves are

 any of the above
 pin type insulator
 strain type
 suspension type

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