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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)

H/3
H/2
2 H/5
2 H/3

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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 : 2.5
1 :25
1:50
1 : 5

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

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

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Hydraulics & Fluid Mechanics
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

maximum
minimum
negative value
could be any value

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Hydraulics & Fluid Mechanics
Uniform flow occurs when

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

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

it is the best liquid
both (B) and (C)
the height of barometer will be less
its vapour pressure is so low that it may be neglected

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