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Power Systems

Power Systems
Specified quantities of slack bus are

 P and δ
 P and V
 V and δ
 P and Q

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Power Systems
The inductance of single phase two wire line is given by

 0.4×10-7× ln(d/r') H/m
 4×10-7× ln(d/r') H/m
 4×10-7× ln(r'/d) H/m
 0.4×10-7× ln(r'/d) H/m

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Power Systems
Find the relation between sub transient (X"), transient (X') and synchronous reactance (X) ?

 X" < X' > X
 X" < X' < X
 X" > X' < X
 X" > X' >X

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Power Systems
Counter poise is used for

 less surge impedance
 proper discharging of lighting surges
 reduce losses
 more surge impedance

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Power Systems
What are the methods of laying underground cables?

 Draw - in - system / duct - pipe laying.
 None of these.
  Both A and B.
 Direct laying.

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Power Systems
The internal flux linkage due to internal flux of a conductor is

 I/2*10-7 wb-T/m
 I/6*10-7 wb-T/m
All of these
 I/4*10-7 wb-T/m

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