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Power Systems

Power Systems
Which turbine is ideally suited to pumped storage plants

 Impeller.
 Francis.
  Kaplan.
 Pelton.

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Power Systems
Length of short transmission line is up to

 150 km
 80 km
 40 km
 any of the above

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

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Power Systems
If we increase the spacing between the phase conductors, the line capacitance

 decreases
 increases
 remains unaffected
None of these

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Power Systems
The fact that current density is higher at the surface when compared to centre is known as

All of these
 carona
 proximity effect
 skin effect

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Power Systems
Offset mho relay is used for the protection of equipment when

None of these
 loss of excitation of the generator
 failure of prime mover of the generator
 either 1 or 2

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