What are the markings called on each side of a ruler?

• A. Dimensions.
• B. Inspectors marks.
• C. Graduations.
• D. Labels.

Answer: (C)

The markings found on each side of a ruler are referred to as graduations. Graduations are the fine lines or divisions that indicate measurements, allowing users to read precise lengths in both fractional or decimal increments. These markings help ensure accuracy when measuring and cutting materials in various trades, including pipefitting, where precision is essential for the proper alignment and fitting of pipes.

Understanding graduations is crucial not just for reading measurements, but also for performing calculations and layouts that require exactness to ensure compatibility and safety in installations. The clarity and consistency of these markings are what allow tradespeople to work effectively and efficiently.