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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60
L.A.N
2 L.A.N
(2 L.A.N)/60

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Hydraulics and Fluid Mechanics in ME
Motion of a liquid in a volute casing of a centrifugal pump is an example of

Forced spiral vortex flow
Spiral vortex flow
Radial
Rotational flow

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Hydraulics and Fluid Mechanics in ME
The point at which the resultant pressure on an immersed surface acts, is known as

Centre of pressure
Centre of immersed surface
Centre of gravity
Centre of depth

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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

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

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

steady flow
uniform flow
turbulent flow
one dimensional flow

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Hydraulics and Fluid Mechanics in ME
A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

Lies above
Lies below
None of these
Coincides with

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