FE Civil Exam Prep 85, Differential Leveling — HI Method and Closure

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 Height of Instrument (HI) is calculated by adding the Backsight (BS) to a known elevation point (HI = Elev + BS). - A new point's elevation is found by subtracting the Foresight (FS) from the Height of Instrument (New Elev = HI - FS). - A Turning Point (TP) is used to move the instrument, receiving a Foresight before the move and a Backsight after to establish a new HI. - Error of closure in a level loop is the difference between the final measured elevation and the known starting benchmark elevation. - Always convert the total loop distance to the correct units (e.g., feet to miles) before calculating the allowable misclosure. 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