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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Ratio of inertia force to elastic force is known as

Mach number
Weber’s number
Reynold’s number
Froude number

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Hydraulics and Fluid Mechanics in ME
When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

An ellipse
A paraboloid
None of these
A triangle

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Hydraulics and Fluid Mechanics in ME
The force per unit length is the unit of

Viscosity
Surface tension
Compressibility
Capillarity

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Hydraulics and Fluid Mechanics in ME
The bulk modulus of elasticity

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

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Hydraulics and Fluid Mechanics in ME
In a depressed nappe

The pressure below the nappe is atmospheric
The pressure below the nappe is negative
The pressure above the nappe is negative
The pressure above the nappe is atmospheric

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Hydraulics and Fluid Mechanics in ME
A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

0.78
0.46
0.64
0.87

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