Intro to Millwright Practice Exam

True or False: Outside micrometers can measure with accuracy down to thousandths of an inch or parts of millimeters.

1. True

2. False

3. Only in metric

4. Only with special models

The correct answer is: True

Outside micrometers are precision measuring instruments specifically designed to measure the external dimensions of an object. They can achieve high accuracy, typically down to a thousandth of an inch (0.001 inches) or fractions of a millimeter (0.01 millimeters). This level of precision is crucial for applications where exact measurements are necessary, such as in machining and manufacturing processes. The design of outside micrometers includes a calibrated scale and a thimble that allows the user to read measurements accurately. Some models may have additional features, such as digital displays or ratchet mechanisms, to ensure consistent pressure during measurement, further enhancing accuracy. In summary, outside micrometers are indeed capable of measuring with great precision down to thousandths of an inch or millimeter parts, making the statement true.