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Power Systems

Power Systems
Find the number of strands of ACSR conductor for 3 layer transmission line?

 1
 29
 7
 19

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Power Systems
Positive, negative and zero sequence impedances of line are 2,2 and 5 pu respectively. Find self and mutual impedances respectively?

 1 and 3 pu
 3 and 1 pu
 2 and 5 pu
 2 and 2 pu

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Power Systems
Which of the following is/are the methods of improving transient stability?

All of these
 Fast acting governing system
 Dynamic breaking
 Fast acting excitation control

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Power Systems
If the conductor diameter decreases, inductance of the line,

 increases
 remains unaffected
 decreases
None of these

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Power Systems
A gas turbine power plant is best suited for

 Base load.
 Peak load.
 None of these.
 Emergency.

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Power Systems
Which of the following decides the insulation level of 400 kV, EHV line?

 radio interference
 skin effect
 switching over voltage
 lighting voltage

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