ESE 2020Q76
Q: Which of the following factors are affecting critical shear stresses? 1. Purity of metals reduces the critical shear stress 2. Surface films greatly enhance the critical shear stress 3. Rise in temperature 4. Rate of deformation and the extent of initial deformation also help in raising the critical shear stress
(a)1, 2 and 3 only
(b)1, 2 and 4 only
(c)1, 3 and 4 only
(d)1, 2, 3 and 4
Correct Answer: (b)
Detailed explanation coming soon.