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Power Systems

Power Systems
Surge impedance loading (SIL) is represented by

 Vl²*√(C/L)
 both 1 and 2
 Vph²/Zs
 Vl²/Zs

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Power Systems
If we increase the length of the transmission line, the charging current

 decreases
None of these
 increases
 remains unaffected

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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

 31.7
 35.45
 38.6
 23.9

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Power Systems
A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is

 200 Ω
 800 Ω
 400 Ω
 0 Ω

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Power Systems
Electrostatic precipitators in thermal power plants are used for

 control flow rate
 removal of ash from flue gas
 remove moisture from the cole
All of these

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Power Systems
Switchgear equipment include

  all of these.
  relays and CB.
  fuses.
  switches.

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