Which instrument is best described as having two adjustable jaws used to measure distance or thickness?

Which instrument is best described as having two adjustable jaws used to measure distance or thickness?

• A. Ruler
• B. Tape measure
• C. Calipers
• D. Protractor

Answer: (C)

Calipers are the instrument designed with two adjustable jaws that grip opposite faces of an object to measure distance or thickness. The outside jaws measure external dimensions, the inside jaws handle internal measurements, and many calipers include a depth rod for measuring thickness or depth. This setup provides precise, direct readings of small gaps, which makes calipers the best tool for measuring distance or thickness. Rulers and tape measures are better for longer lengths along a straight edge, while a protractor is used for angles, not thickness or gap measurements.

Calipers are the instrument designed with two adjustable jaws that grip opposite faces of an object to measure distance or thickness. The outside jaws measure external dimensions, the inside jaws handle internal measurements, and many calipers include a depth rod for measuring thickness or depth. This setup provides precise, direct readings of small gaps, which makes calipers the best tool for measuring distance or thickness. Rulers and tape measures are better for longer lengths along a straight edge, while a protractor is used for angles, not thickness or gap measurements.