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Hydraulics and Fluid Mechanics in ME

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

laminar
steady
unsteady
vortex

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

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Hydraulics and Fluid Mechanics in ME
The maximum efficiency of transmission through a pipe is

0.7666
0.5
0.6667
0.567

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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 below
None of these
Lies above
Coincides with

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Hydraulics and Fluid Mechanics in ME
A differential manometer is used to measure

Atmospheric pressure
Difference of pressures between two points in a pipe
Pressure in Venturimeter
Pressure in pipes and channels

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Hydraulics and Fluid Mechanics in ME
A fluid of kinematic viscosity 0.4 cm²/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be

1.5 m/sec
less than 1 m/sec
1 m/sec
2 m/sec

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