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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

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

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Hydraulics & Fluid Mechanics
The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to

1 PA
9810 PA
91 PA
981 PA

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

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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

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

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Hydraulics & Fluid Mechanics
For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

675
300
337.5
600

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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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