Question

In constant permeability test, the length of specimen is measured by ___________

(a) Calculating the difference in water level

(b) Using Piezometric tube

(c) Using measuring scale

(d) None of the mentioned

This question was addressed to me in an international level competition.

The origin of the question is Constant and Falling Head Permeability Test in section Permeability of Geotechnical Engineering I

Answer 1

Correct answer is (b) Using Piezometric tube

The explanation is: In a constant head test, the length of the sample is measured by inserting piezometric tubes on top and bottom.