A pipe consisting of several pipes of varying diameters and lengths, may be repl

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Question
A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length
Options
A.
B.
C.
D.

Correct Answer

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2. The thickness of a sharp crested weir is kept less than
Options
A. one-third of the height of water on the sill
B. one-half of the height of water on the sill
C. one-fourth of the height of water on the sill
D. two-third of the height of water on the sill
E. none of these.

4. A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec². The ratio of the pressures at its bottom when it is moving vertically up and down, is
Options
A. 2
B. 3
C. 1/2
D. 1/3

6. The shear stress distribution in viscous fluid through a circular pipe is :
Options
A. maximum at the centre
B. maximum at the inside of surface
C. same throughout the section
D. none of these.

7. When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress , where ? is known as
Options
A. coefficient of viscosity
B. absolute viscosity
C. dynamic viscosity
D. viscosity
E. all the above.

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