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Hydraulics & Fluid Mechanics

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

Micro-manometer
Pirani Gauge
ionisastion gauge
Bourdon tube

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Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

independent of shear stress
zero at the pipe wall
None of these
maximum at the pipe wall

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Hydraulics & Fluid Mechanics
The surface tension of mercury at normal temperature compared to that of water is

less
more
same
more or less depending on size of glass tube

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Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

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

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

centroid of the volume of fluid vertically above the body
centriod of the displaced volume of fluid
center of gravity of any submerged body
center of the volume of floating body

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Hydraulics & Fluid Mechanics
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

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

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