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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The pressure less than atmospheric pressure is known as

Suction pressure
Negative gauge pressure
All of the listed here
Vacuum pressure

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

shear stress and rate of angular deformation
viscosity and rate of angular deformation
intensity of pressure and rate of angular deformation
shear stress, viscosity and temperature

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Hydraulics and Fluid Mechanics in ME
Newton's law of viscosity is a relationship between

Shear stress and rate of shear strain
Pressure, velocity and temperature
Shear stress and velocity
Rate of shear strain and temperature

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Hydraulics and Fluid Mechanics in ME
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

H = Hg - hf
H = Hg + hf
H = Hg/hf
H = Hg × hf

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Hydraulics and Fluid Mechanics in ME
The specific weight of water is 1000 kg/m”

All listed here
at 4°C temperature
at normal pressure of 760 mm
at mean sea level

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Hydraulics and Fluid Mechanics in ME
A channel is said to be of most economical cross-section, if

It has minimum wetted perimeter
It gives maximum discharge for a given cross-sectional area and bed slope
All of these
It involves lesser excavation for the designed amount of discharge

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