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

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Hydraulics and Fluid Mechanics in ME
Coefficient of velocity of venturimeter

decreases with higher Reynolds number
is equal to the coefficient of discharge of venturimeter
is independent of Reynolds number
None of these

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Hydraulics and Fluid Mechanics in ME
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A × M × m2/3 × i1/2
A1/2 × M2/3 × m × i
A × M × m1/2 × i2/3
A2/3 × M1/3 × m × i

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Hydraulics and Fluid Mechanics in ME
A flow through an expanding tube at constant rate is called

Unsteady non-uniform flow
Steady uniform flow
Unsteady uniform flow
Steady non-uniform flow

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity with increase in pressure

decreases
increases
increases first upto certain limit and then decreases
remains constant

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Hydraulics and Fluid Mechanics in ME
The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

ρ ω2 r2
ρ ω2 r2/2
ρ ω2 r2/4
2ρ ω2 r2

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