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UPSC Civil Service Exam Questions

Q1:

For laminar flow through a circular tube, the average velocity at a section is

A the same as that at the centre of tube

B two-thirds the velocity at the centre of the tube

C half the velocity at the centre of the tube

D dependent on the pressure at the section

ANS:C - half the velocity at the centre of the tube

Vavg = Vc/2.



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