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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Centre of pressure compared to e.g. is

below it
above or below depending on area of body
above it
at same point

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Hydraulics and Fluid Mechanics in ME
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

0.488
0.848
0.392
0.884

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Hydraulics and Fluid Mechanics in ME
The pressure at a point 4 m below the free surface of water is

19.24 kPa
29.24 kPa
39.24 kPa
49.24 kPa

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Hydraulics and Fluid Mechanics in ME
The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

32μvl/wd²
4μvl/wd²
8μvl/wd²
16μvl/wd²

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Hydraulics and Fluid Mechanics in ME
Gauge pressure at a point is equal to the absolute pressure ___ the atmospheric pressure.

Minus
Plus
Multiply
Divide

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Hydraulics and Fluid Mechanics in ME
Kinematic viscosity is equal to

dynamicviscosity x density
dynamic viscosity/density
density/dynamic viscosity
1/dynamicviscosity x density

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