The thickness of a sharp crested weir is kept less than one-third of the height

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Question
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.

Correct Answer

one-half of the height of water on the sill

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2. 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

4. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if
Options
A. area is horizontal
B. area is vertical
C. area is inclined
D. all the above.

5. The moment of inertia of a floating body along its longitudinal axis and the volume of water displaced by it are I and V respectively. The height of the metacentre above centre of buoyancy of the body, is
Options
A.
B.
C.
D.
E.

8. 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.

9. 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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