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Power Systems

Power Systems
Peak load power plants is/are

 nuclear plants
 diesel plant
 pumped storage plant
 both 1 and 2

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Power Systems
For n bus power system size of Y bus matrix is

 (n-2)×(n-2)
 (n-1)×(n-1)
 n×n
 (n-1)×(n-2)

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Power Systems
Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

  20060 J.
 23060 J.
 25060 J.
  20160 J.

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

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Power Systems
Which of the following faults is/are treated as external faults?

 Failure of prime mover of the generator
 Over voltage
All of these
 Failure of excitation

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the transmitted voltage?

 18.18 kV
 36. 36 kV
 30.6 Kv
 100 kV

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