UPSC Civil Service Exam Questions - Engineering

Q1:

A fixed beam as shown in Fig. I is loaded with a U.D.L. over the entire span, the total load being W; when load was just increased to W1, the deformed shape as shown in Fig. II was seen. The value of W1 (plastic moment of resistance = Mp) is

A

B

C

D

ANS:B -

The Correct answer is 12mp/l for 2 plastic hinges.

And 16mp/l^2 for 3 plastic hinges.