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Power Systems

Power Systems
For complete protection of 3-phase system from the short circuit faults minimum number of relays required are

 six
 two
 three
 one

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Power Systems
Highest pressure generating pump inside the thermal plant is

 low pressure heater
All of these
 high pressure heater
 boiler feed pump

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Power Systems
Aluminium is now most commonly employed conductor material in transmission lines than copper because

 it is cheaper and lighter
 its tensile strength is more
 it is more conductive
 costlier

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Power Systems
Which of the following statements are true?

 Bus admittance matrix is a sparse matrix
 both 1 and 2
 nether 1 nor 2
 Bus impedance matrix is a full matrix

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Power Systems
A 100 Km long transmission line is loaded at 110 kV. If the loss of line is 5 MW and the load is 150 VA the resistance of the line is

  8.06 Ω / phase.
 2.26 Ω / phase.
 4.65 Ω / phase.
 6.06 Ω / phase.

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Power Systems
The function of draft tube is reaction turbine is to

 all of above.
  convert kinetic energy of water.
 increase flow rate of water.
 reduce water hammer.

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