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Power Systems

Power Systems
More efficient plants are used as

None of these
 base load plant
 both 1 and 2
 peak load plant

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Power Systems
The rating of CB is in terms of

  VAR.
  current.
  voltage.
  volt - ampere.

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Power Systems
Positive, negative and zero sequence impedances of line are 2,2 and 5 pu respectively. Find self and mutual impedances respectively?

 2 and 2 pu
 3 and 1 pu
 2 and 5 pu
 1 and 3 pu

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Power Systems
Skin effective is more in case of

 communication lines
None of these
 same in both cases
 power lines

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Power Systems
A penstock is used as a condition between

  the dam and the turbine in a hydro station.
 none of above.
 the heat ex-changer and the turbine in nuclear power plant.
 the turbine and discharge drain.

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Power Systems
A power system network has n nodes, Z33 of its bus impedance matrix is j0.5 pu. The voltage at node 3 is 1.3∠ -10°. If capacitor is having reactance of -j3.5 pu is now added to the network between node 3 and reference node, the current drawn by the capacitor in pu is

 0.433∠ 80°
 0.325∠ -100°
 0.371∠ -100°
 0.725∠ 80°

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