UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements :
1. In a member subjected to uniaxial tensile force the maximum normal stress is the external load divided by the maximum cross-sectional area.
2. When the structural member is subjected to uniaxial loading, the shear stress is zero on a plane where the normal stress is maximum.
3. In a member subjected to uniaxial loading, the normal stress on the planes of maximum shear stress is less than the maximum.
Of these statements :

A 1 and 2 are correct

B 1 and 3 are correct

C 2 and 3 are correct

D 1, 2 and 3 are correct

ANS:A - 1 and 2 are correct

Option C is correct.

At 0 degrees, normal stress will be maximum and shear stress will be 0.

And @45 degrees shear stress is maximum.