Which component is present on digital calipers but not on dial calipers?

• A. LCD display
• B. Computer port
• C. Dial face
• D. Main scale

Answer: (B)

The key difference between digital and dial calipers is how the measurement is shown. Digital calipers display the reading on an electronic LCD screen, whereas dial calipers show the measurement on a mechanical dial with a dial face. That LCD display is the component digital calipers have that dial calipers do not. Some digital models may also include a data-output port for transferring measurements to a computer, but that feature isn’t universal and isn’t the defining distinction. The dial face is unique to dial calipers, and the main scale exists on both, so neither of those serves as the universal differentiator.