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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

maximum at the pipe wall
None of these
independent of shear stress
zero at the pipe wall

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Hydraulics & Fluid Mechanics
Normal depth in open channel flow is the depth of flow corresponding to

laminar flow
uniform flow
Steady flow
unsteady flow

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Hydraulics & Fluid Mechanics
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

25 m/sec
50 m/sec
2 m/sec
10 m/sec

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

size and shape of the cross section in a particular length remain constant
the flow is streamline
size and cross section change uniformly along length
the flow is steady

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Hydraulics & Fluid Mechanics
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

1/2
2/3
1/3
1/4

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Hydraulics & Fluid Mechanics
If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

specific weight
specific density
specific mass
specific gravity

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