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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

Weir
Orifice
Notch
None of these

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Hydraulics and Fluid Mechanics in ME
Capillary action is due to the

Adhesion of the liquid molecules and the molecules on the surface of a solid
All of the listed here
Surface tension
Cohesion of the liquid

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Hydraulics and Fluid Mechanics in ME
A hydraulic accumulator normally consists of

Two coaxial rams and two cylinders
A cylinder and a ram
A cylinder, a piston, storage tank and control valve
Two cylinders, two rams and a storage device

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Hydraulics and Fluid Mechanics in ME
If the depth of water in an open channel is greater than the critical depth, the flow is called

Turbulent flow
Critical flow
Torrential flow
Tranquil flow

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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)

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

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Hydraulics and Fluid Mechanics in ME
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by

dQ/Q = (dH/H)
dQ/Q = (3/2) × (dH/H)
dQ/Q = (3/4) × (dH/H)
dQ/Q = (1/2) × (dH/H)

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