FE Civil Exam Prep 39, Shear and Moment Diagrams — Sign Convention Trap

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The NCEES sign convention: Positive shear is down on the right face of a cut, and positive moment causes a beam to sag like a smile. - The graphical relationship where the slope of the shear diagram equals the negative of the distributed load intensity (dV/dx = -w). - The critical shear-moment relationship: The slope of the moment diagram equals the shear force value (dM/dx = V). - How to find maximum moment: The maximum bending moment always occurs at the point where the shear force diagram crosses zero. - The concentrated moment trap: A clockwise applied moment causes an immediate upward jump in the moment diagram, a common point of confusion. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep