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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

Double
Equal to
Three fourth
One-half

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Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

energy
length
mass
work

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Hydraulics and Fluid Mechanics in ME
According to equation of continuity,

a1/v1 = a2/v2
a1v1 = a2v2
w1v1 = w2v2
w1a1 = w2a2

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

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Hydraulics and Fluid Mechanics in ME
A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

1 m
10m
100m
None of these

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Hydraulics and Fluid Mechanics in ME
Working principle of dead weight pressure gauge tester is based on

Pascal’s law
Avogadro’s hypothesis
Dalton’s law of partial pressure
Newton’s law of viscosity

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