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Power Systems

Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LLG
 LL
 LG
 LLL

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Power Systems
Attenuation occurs due to

 resistance
 inductance
 both 1 and 3
 conductance

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Power Systems
Operating time of pumped storage plant is

 very high
 low
 can't say
 high

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Power Systems
A 3-phase, 110 kV coaxial XLPE insulated power cable delivering power at 50 Hz, has a capacitance of 125 nF/km. If the dielectric loss tangent of XLPE is 2*10^-4, then dielcetric power loss in this cable in W/km/phase is

 35.45
 31.7
 38.6
 23.9

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Power Systems
In thermal power stations, economiser will

 reduce the heat
 both 2 and 3
 increase the thermal efficiency
 reduce the thermal efficiency

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Power Systems
The rating of CB is in terms of

  volt - ampere.
  voltage.
  VAR.
  current.

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