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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Piezometer is used to measure

Difference of pressure between two points
Pressure in pipe, channels etc
Very low pressures
Atmospheric pressure

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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

0.87
0.64
0.78
0.46

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Hydraulics and Fluid Mechanics in ME
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

27/8
44078
43924
43892

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

μπ²NR³/60t
μπ²NR⁴/60t
μπ²NR²/60t
μπ²NR/60t

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Hydraulics and Fluid Mechanics in ME
The force present in a moving liquid is

Gravity force
Inertia force
Viscous force
All of these

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Hydraulics and Fluid Mechanics in ME
A fluid in equilibrium can't sustain

Shear stress
Bending stress
Tensile stress
Compressive stress

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