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Hydraulics & Fluid Mechanics

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

viscosity
surface tension
cohesion
friction

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

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

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Hydraulics & Fluid Mechanics
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

4.6 M
4.0 M
4.8 M
4.2 M

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Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

decrease
remain same
increase/decrease depending on depth of immersion
increase

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Hydraulics & Fluid Mechanics
Surface energy per unit area of a surface is numerically equal to

surface tension
force of cohesion
atmospheric pressure
force of adhesion

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

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

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