Which option correctly lists an acceptable thickness measurement device?

• A. Jig
• B. Calipers
• C. Tape measure
• D. All of the above

Answer: (D)

Measuring thickness effectively means using a tool that can yield a reliable dimension within the required range. Calipers offer precise readings for small thicknesses, which is ideal when tight tolerances are important. A tape measure is handy for quick checks over larger areas or when a rigid, fixed scale isn’t practical, even though it’s typically less precise. A jig can serve as a fixed reference or gauge, helping you set or verify a thickness by providing a known distance or a stable measuring setup. Taken together, these tools cover both precision measurements and practical field checks, so all listed devices can be used for thickness measurement in the right context.