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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In a centrifugal pump, the regulating valve is provided on the

Casing
Delivery pipe
Impeller
Suction pipe

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Hydraulics and Fluid Mechanics in ME
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

v²/2g
0.5v²/2g
0.375v²/2g
0.75v²/2g

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Hydraulics and Fluid Mechanics in ME
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

35.3 kN
33.3 kN
None of these
3.53 kN

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

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

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Hydraulics and Fluid Mechanics in ME
In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

1/16 to 1/8
1/3 to 1/2
1/4 to 1/3
1/8 to 1/4

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Hydraulics and Fluid Mechanics in ME
The working of which of the following hydraulic units is based on Pascal's law?

Hydraulic coupling
Air lift pump
Jet pump
Hydraulic press

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