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Power Systems

Power Systems
Fault calculations using computer are usually done by

 Y bus method
 Z bus method
None of these
 either 1 or 2

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Power Systems
A generating station has a maximum demand of 50 MW a load factor of 60 %, a plant capacity factor of 45 % and if the plant while running as per schedule were fully loaded. The daily energy produced will be

  720 MW.
 710 MW.
 740 MW.
 730 MW.

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Power Systems
What is the approximate efficiency of a normal thermal power station?

 45-55%
 60-70%
 20-25%
 30-40%

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Power Systems
A string insulator has 4 units. The voltage across bottom most unit is 10 kV and its efficiency is 90%. Find the total operating phase voltage?

 45 kV
 32 kV
 36 kV
 40 kV

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Power Systems
Maximum power capacity of a transmission line can be increased by

 decreasing reactance value
 nether 1 nor 2
 increasing voltage level
 either 1 or 2

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Power Systems
Where is the draft tube of a hydroelectric plant that is an airtight pipe located

 At the beginning of the penstock.
 Near the surge tank.
  In between the penstock and runner.
 In between the runner exhaust and the tail race.

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