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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The ratio of the inertia force to the viscous force is called

Weber's number
Froude's number
Reynold's number
Euler's number

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Hydraulics and Fluid Mechanics in ME
In a depressed nappe

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

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Hydraulics and Fluid Mechanics in ME
The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Mechanical efficiency
Overall efficiency
Volumetric efficiency
Manometric efficiency

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Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece is

0.707
0.855
0.375
0.5

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Hydraulics and Fluid Mechanics in ME
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

0.4
0.3
0.6
0.83

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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)

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

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