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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

0°K
0°C
20°C
4°C

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

surface tension
viscosity
friction
cohesion

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Hydraulics & Fluid Mechanics
In which of the following the friction drag is generally larger than pressure drag?

an airfoil
a sphere
a circular disc or plate held normal to flow
a cylinder

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Hydraulics & Fluid Mechanics
In a Sutro weir, the discharge is proportional to (where H is head)

H5/2
H3/2
H
H1/2

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Hydraulics & Fluid Mechanics
Operation of McLeod gauge used for low pressure measurement is based on the principle of

gas law
Pascal’s law
Charle’s law
Boyle’s law

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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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