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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 power factor
 current
 reactive power
 voltage

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

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

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

 Quick response to load variation.
 Low capital cost.
All of these
 Capability of quick starts.

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Power Systems
For n bus power system size of Y bus matrix is

 (n-1)×(n-1)
 (n-2)×(n-2)
 n×n
 (n-1)×(n-2)

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Power Systems
If the inertia constant H = 10 MJ/MVA for a 50 MVA generator, the stored energy is

 500 MJ
 5 MJ
 50 MJ
 10 MJ

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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

 23.9
 35.45
 31.7
 38.6

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