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Hydraulics & Fluid Mechanics

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

Bourdon tube
ionisastion gauge
Pirani Gauge
Micro-manometer

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Hydraulics & Fluid Mechanics
The resultant of all normal pressures acts

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

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

incompressible flow
uniform flow
frictionless flow
steady flow

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Hydraulics & Fluid Mechanics
Coefficient of velocity for Borda’s mouth piece running full is

0.855
0.707
1.00
0.611

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

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

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Hydraulics & Fluid Mechanics
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

inversely as the square of the radial distance
as the square of the radial distance
inversely as the radial distance
linearly with radial distance

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