At a given depth, the skin friction of the well is equal to __________
(a) Diameter of well
(b) μ times the lateral earth pressure
(c) Stress condition
(d) All of the mentioned
I had been asked this question in examination.
I'm obligated to ask this question of Well Curb, Cutting Edge, Steining and Bottom Plug topic in division Well Foundations of Geotechnical Engineering II