UPSC Civil Service Exam Questions - Engineering

Q1:

If an element is subjected to pure shearing stress τxy then the maximum principal stress is equal to

Axy

B τxy/2

C τxy

D
1 - (τxy)2

ANS:C - τxy

Since pure shearing stress subjected, then no normal stress so it becomes zero then now, root over Txy^2. Cancel root with square and the final answer Txy.