GATE CE 2014 Set 2 — Question 17
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Structural Engineering → Statics & Rigid Bodies → Moment of Inertia
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Question
The first moment of area about the axis of bending for a beam cross-section is
Correct answer
(B) section modulus
Solution
The first moment of area is defined as . For a beam cross-section, the first moment of area of the entire section about the neutral axis is zero. However, in the context of structural engineering and the options provided in this specific GATE paper, the question refers to the section modulus , which is a property related to the bending capacity of the section. According to the official answer key, the correct option is (B).
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