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Power Systems

Power Systems
For flat voltage profile system, voltage regulation is

 100%
 0%
 50%
 any of the above

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Power Systems
A thermal power plant is being supplied with coal having much more ash content than that for which it was designed. Which of its following units needs major modifications

 Condenser.
 Pulversing unit.
 Ash handling unit.
 Cooling tower.

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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

 20.
  5.
 10.
 55.1.

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Power Systems
Maximum power capacity of a transmission line can be increased by

 increasing voltage level
 either 1 or 2
 decreasing reactance value
 nether 1 nor 2

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Power Systems
A 3 layer, total diameter of an ACSR conductor is 5 cm. Find the diameter of each strand?

 1.5 cm
 5 cm
 1 cm
 15 cm

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Power Systems
When a transformer is loaded, the secondary terminal voltage gains. That means power factor is

 unity.
 lagging.
  leading.
 zero.

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