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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.

Neutral
None of these
Stable
Unstable

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Hydraulics and Fluid Mechanics in ME
A flow through a long pipe at decreasing rate is called __________ uniform flow.

Both A and B
None of these
Unsteady
Steady

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is neither laminar nor turbulent when Reynold number is

More than 2800
None of these
Less than 2000
Between 2000 and 2800

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Irrespective of any position
Kept 50% open
Kept fully open
Kept fully closed

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Hydraulics and Fluid Mechanics in ME
The unit discharge through the turbine is

Q/√H
Q/H²
Q/H
Q/H3/2

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Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

v₂²/2g
0.5 v₁²/2g
v₁²/2g
0.375 v₂²/2g

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