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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A flow through a long pipe at constant rate is called

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

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

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Hydraulics and Fluid Mechanics in ME
A flow is called sub-sonic, if the Mach number is

More than 6
Between 1 and 6
Unity
Less than unity

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

is independent of pressure and viscosity
increases with pressure
has the dimensions of 1/pressure
is large when fluid is more compressible

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Hydraulics and Fluid Mechanics in ME
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Narrow-crested weir
Ogee weir
Submerged weir
Broad-crested weir

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Hydraulics and Fluid Mechanics in ME
Manometer is used to measure

difference of pressure between two points
pressure in pipes, channels etc
atmospheric pressure
very low pressure

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