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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - nH)H3
1.84(L - 0.1nH)H5/2
1.84(L - 0.1nH)H3/2
1.84(L - nH)H2

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Hydraulics and Fluid Mechanics in ME
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

turbulent flow
uniform flow
steady flow
one dimensional flow

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Hydraulics and Fluid Mechanics in ME
Centre of pressure compared to e.g. is

above it
at same point
below it
above or below depending on area of body

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(p/W) × (a/A)
(W/p) × (A/a)
(p/W) × (A/a)
(W/p) × (a/A)

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Hydraulics and Fluid Mechanics in ME
Dynamic similarity is said to exist between the model and the prototype, if both of them

None of these
Are identical in shape, but differ only in size
Are equal in size and shape
Have identical velocities

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

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