Which tool is used to measure external dimensions with high precision in carpentry or metalworking?

• A. Micrometer
• B. Caliper
• C. Ruler
• D. Tape measure

Answer: (B)

Calipers are used to measure external dimensions with high precision in carpentry or metalworking. They have outside jaws that grip the exterior of an object, allowing you to read a precise measurement, often down to hundredths of a millimeter or thousandths of an inch depending on the instrument. This versatility—measuring external size, internal dimensions, and depths—makes calipers a go-to tool for checking parts and ensuring fits with good accuracy.

A micrometer offers even higher precision, but it’s typically used for smaller objects and tighter tolerances, one tool for very specific, limited ranges. Ruler and tape measure, while useful for quick, rough measurements, don’t provide the same level of precision required for high-accuracy work.

So the caliper is the best choice for measuring external dimensions with high precision in these fields.