Question

The laboratory observation falling head test consist of measurements of ____________

(a) h1 at an interval of t1 and h2 at an interval of t2

(b) Only t1 and t2

(c) None of the mentioned

(d) All of the mentioned

I had been asked this question in an interview for job.

My doubt stems from Constant and Falling Head Permeability Test in portion Permeability of Geotechnical Engineering I

Answer 1

The correct answer is (a) h1 at an interval of t1 and h2 at an interval of t2

To explain I would say: The laboratory measurement of falling head permeability test consists of measurement of the heads h1 and h2 at two chosen time intervals t1 and t2.