The pressure of air __________ with the increase of height from the surface of t

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Question
The pressure of air __________ with the increase of height from the surface of the earth.
Options
A. does not change
B. decreases
C. increases

Correct Answer

decreases

Hydraulics and Fluid Mechanics problems

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2. The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, ? = Viscosity of the liquid, and w = Specific weight of the flowing liquid)
Options
A.
B.
C.
D.

5. The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where I_G = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)
Options
A.
B.
C.
D.

7. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
Options
A. A x M x m^1/2 x i^2/3
B. A x M x m^2/3 x i^1/2
C. A^1/2 x M^2/3 x m x i
D. A^2/3 x M^1/3 x m x i

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