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UPSC Civil Service Exam Questions

Q1:

ABCD is a beam of length 5l which is supported at B and C (having supported length BC = 'l') and having two equal overhangs AB and CD of length 2l each. It carries a u.d.l. of intensity p per unit length throughout the beam as shown in the given figure.
The points of contraflexure will occur

A at B and C

B no where in the beam

C at the mid-point of BC

D at the mid-points of AB and CD

ANS:C - at the mid-point of BC

Point with Nil bending moment is called a point of contraflexure.



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