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UPSC Civil Service Exam Questions

Q1:

Consider the following statements :
1. Point of contraflexure is the point where the bending moment is maximum.
2. Point of cantraflexure is the point where the bending moment changes sign.
3. Point of contraflexure is the point where the shear force is zero.
Which of these statements is/are correct ?

A 1, 2 and 3

B 2 and 3

C 2 only

D 1 only

ANS:B - 2 and 3

It's option C, because the point of contraflexure is a point where Bending moment changes its sign.

At that point, Bending moment will be zero. Shear force will be maximum.

Since the rate of change of Bending moment is a shear force.



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