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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

less than 4000
between 2000 and 4000
more than 4000
less than 2000

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

29.24 kPa
39.24 kPa
19.24 kPa
49.24 kPa

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Hydraulics and Fluid Mechanics in ME
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

Geometric mean
Sum
Difference
Arithmetic mean

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Hydraulics and Fluid Mechanics in ME
A flow through a long pipe at constant rate is called

Steady non-uniform flow
Unsteady uniform flow
Steady uniform flow
Unsteady non-uniform flow

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Hydraulics and Fluid Mechanics in ME
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is

1
43832
1/√2
√2

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Hydraulics and Fluid Mechanics in ME
The vapour pressure over the concave surface is

zero
equal to the vapour pressure over the plane surface
less man the vapour pressure over the plane surface
greater than the vapour pressure over the plane surface

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