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UPSC Civil Service Exam Questions

Q1:
The given figure shows the section of a wooden beam stiffened with two steel plates each of thickness 't' securely fixed to the sides. The second moment of area of the flitched beam about the X-X axis is (given: d = overall depth of the beam, b = width of the wooden section and m = modular ratio of the moduli of elasticity of steel and wood)

A

B

C

D

ANS:D -

C is the right answer.

The Width of the equivalent section will be B = b + 2mt and depth will be D only.



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