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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
All the terms of energy in Bernoulli’s equation have dimension of

length
work
energy
mass

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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)

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

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Hydraulics and Fluid Mechanics in ME
The highest efficiency is obtained with a channel of __________ section.

Trapezoidal
Circular
Square
Rectangular

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

Square root of velocity
Directly proportional
None of these
Inversely proportional

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Hydraulics and Fluid Mechanics in ME
The pressure at the summit of a syphon is

None of these
more than atmospheric
less than atmospheric
equal to atmospheric

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

None of these
Less than
More than
Equal to

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