AAMI Certified Associate In Biomedical Technology (CABT) Practice Exam

A tachometer is primarily used to measure what?

Temperature Pressure Speed of rotation Voltage

Correct Answer:

Speed of rotation

Explanation:

A tachometer is used to measure how fast something is spinning—the speed of rotation. It typically displays RPM, which tells you the rotational rate of a shaft or rotor. This is essential for ensuring equipment runs within safe and specified limits and can feed data to control systems or gauges for operators. Temperature is read with thermometers, pressure with gauges, and voltage with meters, so those measurements come from different instruments. Therefore, the correct choice is speed of rotation.

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