Hydraulics and Fluid Mechanics in ME
An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

Less than twice
More than three times
Less than three times
More than twice

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Hydraulics and Fluid Mechanics in ME
Surface tension

Is also known as capillarity
Decreases with fall in temperature
Acts in the plane of the interface normal to any line in the surface
Is a function of the curvature of the interface

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