Question

The test which is conducted by an indirect method usually is __________

(a) Compressive strength test

(b) Shear strength test

(c) Bending strength test

(d) Tensile strength test

The question was posed to me in semester exam.

My enquiry is from Rocks as Materials for Construction topic in division Engineering Properties of Rocks of Engineering Geology

Answer 1

Right answer is (d) Tensile strength test

Explanation: The tensile strength of rock samples may be determined directly or indirectly. The direct method would require elaborate means to avoid bending while applying tensile forces. Hence usually indirect methods are used to find out the tensile strength of the stones.