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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Pressure of the order of 10''' torr can be measured by

Pirani Gauge
ionisastion gauge
Bourdon tube
Micro-manometer

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

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

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

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

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

ZERO
SAME AS BUOYANT FORCE
None of these
NEGLIGIBLE

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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

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

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

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