UPSC Civil Service Exam Questions - Engineering

Q1:

A horizontal fixed beam is fixed at both it ends A and B. During loading, the right support sinks by an amount δ. Flexural rigidity of the beam is uniform and is equal to EI. Length of the beam is L. What is the moment developed at the centre of the beam due to sinking of the support ?

AEI δ/L2

B zero

CEI δ/L2

D 12 EI δ/L2

ANS:B - zero

Option A is for moment developed at both the fixed ends.

Option D is for reactions developed at both the fixed supports.