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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
An ideal flow of any fluid must fulfill the following

Newton’s law of motion
Newton’s law of viscosity
Continuity equation
Pascal’ law

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Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

surface tension is no criterion
lower surface tension
high density and viscosity
higher surface tension

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Hydraulics and Fluid Mechanics in ME
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.

One-third
Two-third
Three-fourth
Equal to

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

4.5 kN/m3
7.5 kN/m3
6 kN/m3
10 kN/m3

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Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

V/(vr + v)
V/(vr - v)
2V/(vr - v)
2V/(vr + v)

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

Uniform flow
Vortex flow
Turbulent flow
Steady flow

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