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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)

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

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Hydraulics & Fluid Mechanics
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

10.0 m above the hydraulic gradient
5.0 above the hydraulic gradient
2.4 m above the hydraulic gradient
6.4 m above the hydraulic gradient

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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

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

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Hydraulics & Fluid Mechanics
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to

weight of the fluid displaced by the body
more than the weight of the body
the weight of the body
less than the weight of the body

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Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

vertically upwards
at center of pressure
at metacentre
at e.g. of body

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

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

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