ASVAB · Measuring and Marking

A micrometer is used to measure dimensions with greater accuracy than a standard ruler. What is a micrometer's typical precision?

Correct answer

1/1000 inch (0.001 inch or 0.01 mm)

A 1/2 inch
B 1/16 inch
C 1/1000 inch (0.001 inch or 0.01 mm)
D 1/100 inch

Why this is the answer

A micrometer (screw gauge) measures to 0.001 inch (one thousandth of an inch) or 0.01 mm precision — far more accurate than a standard ruler (1/16 inch) or even a digital caliper (0.001 inch for some models). Micrometers are used in precision machining, engine work, and anywhere exact dimension verification is required. The thimble scale and sleeve scale are read together to obtain the measurement.

Source: ASVAB SI, Precision Measuring

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A micrometer is used to measure dimensions with greater accuracy than a standard ruler. What is a micrometer's typical precision?

Why this is the answer

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