NICET - Highway Construction Inspection Practice Exam

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In surveying, what does BS stand for?

  1. Back Sight

  2. Base Survey

  3. Benchmark Standard

  4. Blind Sight

The correct answer is: Back Sight

In surveying, "BS" stands for Back Sight. It is a critical term used during the leveling process, which involves measuring the height difference between two points. When a surveyor sets up a level instrument at a known elevation point, the measurement taken from that point to a target point is called a "Back Sight." This measurement is used to help determine the elevation of the benchmark or the instrument's height. By taking a back sight, surveyors can establish a reference point that allows for cumulative elevation calculations as they survey additional points. Understanding the term and its application is essential for accurately performing leveling operations in surveying and ensuring that structures and roads are built to the correct specifications.