Question

At a point, there are/is _________ normal stress.

(a) 1

(b) 2

(c) 3

(d) 4

The question was posed to me in exam.

My enquiry is from Elasticity in portion Elements of Elasticity of Geotechnical Engineering I

Answer 1

The correct choice is (c) 3

For explanation: At a point, there are three normal stresses. The normal stresses are represented by σ. The three normal stresses at a point are σx, σy and σz. The x, y and z represent the signifies that stress acts on the face of the element that is perpendicular to x,y and z directions respectively.