Hydraulics and Fluid Mechanics in ME
Capillary action is due to the

Cohesion of the liquid
Adhesion of the liquid molecules and the molecules on the surface of a solid
Surface tension
All of the listed here

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

The pressure on the bottom of the wall is maximum
The pressure on the wall at the liquid level is minimum
The pressure on the bottom of the wall is zero
The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

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