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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A fluid which obeys the Newton's law of viscosity is termed as

Real fluid
Ideal fluid
Newtonian fluid
Non-Newtonian fluid

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Hydraulics and Fluid Mechanics in ME
In an immersed body, centre of pressure is

At the centre of gravity
Could be above or below e.g. depending on density of body and liquid
Above the centre of gravity
Below be centre of gravity

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Hydraulics and Fluid Mechanics in ME
Working principle of dead weight pressure gauge tester is based on

Pascal’s law
Avogadro’s hypothesis
Newton’s law of viscosity
Dalton’s law of partial pressure

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Hydraulics and Fluid Mechanics in ME
The increase of temperature results in

decrease in viscosity of gas
increase in viscosity of gas
increase in viscosity of liquid
decrease in viscosity of liquid

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

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe is turbulent when Reynold number is

Between 2000 and 2800
None of these
More than 2800
Less than 2000

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