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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
When a body floating in a liquid, is displaced slightly, it oscillates about

center of pressure
metacentre
center of buoyancy
e.g. of body

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

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

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Hydraulics & Fluid Mechanics
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

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

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Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

(a)p = Txr
(d)p = 2T/r
p = T/2r
(b)p = T/r

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

center of gravity of any submerged body
center of the volume of floating body
centroid of the volume of fluid vertically above the body
centriod of the displaced volume of fluid

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Hydraulics & Fluid Mechanics
The increase in meta centric height i) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is

(ii) and (iii)
(ii) and (iv)
(i) and (iv)
(i) and (iii)

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