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Power Systems

Power Systems
If all the sequence voltages at the fault point in a power system are equal, then the fault point is a

 LL
 LG
 LLL
 LLG

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Power Systems
The per unit impedance of a circuit element is 0.30. If the base kV and base MVA are halved, then the new value of the per unit impedance of the circuit element will be

 0.0060
 0.60
 0.30
 0.0030

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Power Systems
Taking the density of water to be 1000 kg/m³, how much power would be developed by a hydro electric generator unit, assume 100% efficiency, with 1 m head and 1 m³/s discharge?

 19.60 kW
 9.81 kW
 2.90 kW
 4.45 kW

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Power Systems
Critical visual voltage is the voltage at which

 both 1 and 2
 corona is visible with blue or violet colour
None of these
 corona is just initiated

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Power Systems
The total number of strands in a ACSR conductor are 7, then find the layer number?

 3
 5
 7
 2

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Power Systems
Hydro-graph is similar to

 mass curve.
 energy load curve.
  load curve.
 both B and C.

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