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Mechanical Engineering - Hydraulics and Fluid Mechanics

Exercise : Hydraulics and Fluid Mechanics - Section 3
21.
Select the correct statement
Weber's number is the ratio of inertia force to elastic force.
Weber's number is the ratio of gravity force to surface tension force.
Weber's number is the ratio of viscous force to pressure force.
Weber's number is the ratio of inertia force to surface tension force.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The specific weight of sea water is __________ that of pure water.
same as
less than
more than
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.
neutral
stable
unstable
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called
Newton's law of motion
Newton's law of cooling
Newton's law of viscosity
Newton's law of resistance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
1/2 depth
1/2 breadth
1/2 sloping side
1/4 (depth + breadth)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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