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Power Systems

Power Systems
Calorific value of solid fuel is expressed as

  Cal / gm.
  KCal / gm.
  KCal / lt.
  Cal / lt.

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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

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

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Power Systems
The rate of rise of restricting voltage depends upon the

 Type of CB.
 Inductance of the system.
  Inductance and capacitance of the system.
 Capacitance of the system.

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Power Systems
Based on the discharge, Kaplan turbine will discharge

 >10000 lpm
 1000 lpm

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Power Systems
The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to

 22.5 electrical degrees/s²
 12.5 electrical degrees/s²
 225 electrical degrees/s²
 125 electrical degrees/s²

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Power Systems
A transmission line is compensated with shunt capacitance Csh. If the uncompensated transmission line surge impedance is Zs, then find the new surge impedance Zn after shunt compensation?

All of these
 √(1 + Kcsh)/Zs
 Zs/√(1 + Kcsh)
 Zs*√(1 + Kcsh)

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