Question

_________ consists of driving either a hollow tube or a steel rod or an iron rod into the ground.

(a) Trail pits

(b) Test piles

(c) Probing

(d) Digging

I got this question in an interview.

My doubt stems from Site Exploration Methods topic in section Site Investigation and Ground Techniques of Construction & Building Materials

Answer 1

The correct answer is (c) Probing

For explanation I would say: In Probing, a hollow tube of diameter 35 mm to 50 mm is taken. The tube is driven into the ground 300 mm or so at a time. It is then withdrawn and the material caught in the slit is inspected.