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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = D.b.Vf
Q = π.D.bf.V
Q = π.D.Vf
Q = π.b.Vf

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Hydraulics and Fluid Mechanics in ME
Choose the correct relationship

specific gravity = gravity x density
kinematicviscosity = dynamicviscosity x density
dynamicviscosity = kinematicviscosity x density
gravity = specific gravity x density

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Hydraulics and Fluid Mechanics in ME
A hydraulic intensifier normally consists of

A cylinder, a piston, storage tank and control valve
Two coaxial rams and two cylinders
A cylinder and a ram
Two cylinders, two rams and a storage device

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Hydraulics and Fluid Mechanics in ME
Flow occurring in a pipeline when a valve is being opened is

vortex
laminar
unsteady
steady

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Hydraulics and Fluid Mechanics in ME
The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/2 × depth
1/4 × (depth + breadth)
1/2 × sloping side
1/2 × breadth

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Hydraulics and Fluid Mechanics in ME
The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

4.0 m
5.0 m
3.0 m
2.4 m

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