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Mechanical Engineering - Hydraulics and Fluid Mechanics

Exercise : Hydraulics and Fluid Mechanics - Section 3
46.
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
half the depth
half the breadth
twice the depth
twice the breadth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
a triangle
a paraboloid
an ellipse
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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