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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

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

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Hydraulics & Fluid Mechanics
For measuring flow by a venturimeter, if should be installed in

in any direction and in any location.
inclined line with upward flow
vertical line
horizontal line

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Hydraulics & Fluid Mechanics
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 :25
1:50
1 : 2.5
1 : 5

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Hydraulics & Fluid Mechanics
Surface energy per unit area of a surface is numerically equal to

surface tension
force of adhesion
atmospheric pressure
force of cohesion

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Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

9.81 m/sec²
10.2/m sec
9.75 m/sec²
10m/sec²

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Hydraulics & Fluid Mechanics
The line of action of the buoyant force acts through the centroid of the

volume of the fluid vertically above the body
submerged body
volume of the floating body
displaced volume of the fluid

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