In hand operated rings in ‘auger and shell boring’ the depth of which it can be used is _________
(a) 40 m
(b) 30 m
(c) 25 m
(d) 15 m
This question was posed to me in semester exam.
My question is from Soil Samples and Samplers topic in division Stabilisation of Soils, Site Investigation and Sub – Soil Exploration of Geotechnical Engineering II