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Power Systems

Power Systems
Mho relay is used for protection of

  none of these.
  medium lines.
  long lines.
  short lines.

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Power Systems
The positive, negative and zero sequence impedances of a transmission line are 0.5,0.5 and 1.1 pu respectively. The self (Zs) and mutual (Zm) impedances of the line will be given by

 Zs = 0.2 pu, Zm =0.7 pu
 Zs = 0.5 pu, Zm =0.6 pu
 Zs = 0.6 pu, Zm =0.5 pu
 Zs = 0.7 pu, Zm =0.2 pu

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Power Systems
More efficient plants are used as

 base load plant
 peak load plant
 both 1 and 2
None of these

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Power Systems
A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is

 6
 2
 16
 10

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

 5
 2
 7
 3

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Power Systems
In triangular configuration, inductance and capacitance values are ------ and ------ respectively

 less, higher
 higher, less
 less, less
 higher, higher

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