Which of the following factors are affecting critical shear stresses?1 – McqOptions

MCQOPTIONS

1.	Which of the following factors are affecting critical shear stresses?1. Purity of metals reduces the critical shear stress2. Surface films greatly enhance the critical shear stress3. Rise in temperature4. 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
Answer» E.

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