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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 buoyancy
metacentre
center of pressure
e.g. of body

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Hydraulics & Fluid Mechanics
The discharge through a V- notch varies as

H5/2
H3’2
H5’4 where H is head.
H1/2

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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 ?

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

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Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

cohesion
viscosity
surface tension
friction

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Hydraulics & Fluid Mechanics
A perfect gas

is incompressible
None of these
is of theoretical interest
has constant viscosity

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Hydraulics & Fluid Mechanics
For a floating body to be in equilibrium

center of buoyancy and e.g. must lie on same vertical plane
a righting couple should be formed
meta center should be above e.g.
All of these

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