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Hydraulics and Fluid Mechanics in ME

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

0.83
0.4
0.6
0.3

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Hydraulics and Fluid Mechanics in ME
The optimum value of vane exit angle for a centrifugal pump impeller is

20-25°
10-15°
50-60°
30-40°

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Hydraulics and Fluid Mechanics in ME
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

(8/15) Cd. 2g. H²
(8/15) Cd. 2g. H5/2
(8/15) Cd. 2g. H
(8/15) Cd. 2g. H3/2

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Hydraulics and Fluid Mechanics in ME
The discharge over a triangular notch is

Directly proportional to H3/2
Directly proportional to H5/2
Inversely proportional to H3/2
Inversely proportional to H5/2

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Hydraulics and Fluid Mechanics in ME
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

μ π³ N² R⁴ /3600 t
μ π³ N² R² /3600 t
μ π³ N² R² /1800 t
μ π³ N² R⁴ /1800 t

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Hydraulics and Fluid Mechanics in ME
The unit of viscosity is

Newton-sec per meter²
Newton-sec per meter
kg-sec/meter
Meters² per sec

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