SSC JE Mechanical Engineering 2013 Paper

Question : 115 of 200

Marks: +1, -0

Assertion (A): The preferred cross-section of a beam subjected to transverse loading is I section.
Reason (R): Section modulus of I section is low

Both A and R are true and R is a correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
R is true but A is false

Validate

Solution:

Section modulus

[Z_x=I_\xx/y]

Low for I cross section
Stress bending

σ_b=M/Z_\xx

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