Which hand tool is used to measure inside and outside distances?

Which hand tool is used to measure inside and outside distances?

• A. Vernier caliper
• B. Micrometer
• C. Ruler
• D. Tape measure

Answer: (A)

Measuring inside and outside distances requires a tool that can grip both the outside of an object and the inside of a bore, plus a way to reach depths. A vernier caliper has large jaws for external measurements and small jaws for internal measurements, plus a depth rod for measuring how deep a hole is. This combination lets you accurately read both outside and inside dimensions with one instrument. A micrometer is superb for precise external measurements but isn’t built for inside measurements or depth. Rulers and tape measures are useful for quick, rough measurements but lack the precision and dual-jaw capability needed for inside and outside distances. So the vernier caliper is the best choice for measuring both inside and outside distances.

Measuring inside and outside distances requires a tool that can grip both the outside of an object and the inside of a bore, plus a way to reach depths. A vernier caliper has large jaws for external measurements and small jaws for internal measurements, plus a depth rod for measuring how deep a hole is. This combination lets you accurately read both outside and inside dimensions with one instrument. A micrometer is superb for precise external measurements but isn’t built for inside measurements or depth. Rulers and tape measures are useful for quick, rough measurements but lack the precision and dual-jaw capability needed for inside and outside distances. So the vernier caliper is the best choice for measuring both inside and outside distances.