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Power Systems

Power Systems
Find the value of a729, where "a" is the operator

 0
 α²
 1
 α

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm sinωt?

 2.63 msec
 1.47 msec
 9.68 msec
 4.68 msec

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

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

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Power Systems
A power generating station has a plant capacity of 200 MW and maximum power demand is 150 MW. If average power generation is 110 MW, then find the load factor and capacity factor respectively?

 0.733 and 0.65
 0.65 and 0.55
 0.55 and 0.733
 0.733 and 0.55

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Power Systems
Transmission line parameters of the short transmission line are

 1,Z,0,1
 1,Z,Y,1
 Z,0,Y,1
 1,0,Y,1

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Power Systems
If the inertia constant H = 8 MJ/MVA for a 50 MVA generator, the stored energy is

 8 MJ
 400 MJ
 50 MJ
 200 MJ

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