⚙️ FE Exam Prep

The first moment of area is used to find:

A Moment of inertia
B The centroid of a cross-section
C Shear modulus
D Poissons ratio

✓ Correct Answer: Option B

First moment Q = ∫y dA. Centroid location: ȳ = Q/A. Used in shear stress calculations and composite areas.

💡 Why is B) the correct answer?

The correct answer to the question "The first moment of area is used to find:" is Option B: The centroid of a cross-section.

The other options — A) Moment of inertia, C) Shear modulus, D) Poissons ratio — are incorrect for this FE Exam Prep question. As explained above: First moment Q = ∫y dA. Centroid location: ȳ = Q/A. Used in shear stress calculations and composite areas.

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Physical Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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