True or False? The tachometer is an instrument used for measuring rotational speed.

The tachometer is indeed an instrument designed to measure rotational speed, usually expressed in revolutions per minute (RPM). It is commonly found in vehicles to provide the driver with information about the engine's speed, which is crucial for efficient operation and performance. Understanding the engine's RPM helps drivers make informed decisions about gear shifting, optimizing fuel efficiency, and ensuring the engine operates within its optimal range to avoid damage. Therefore, stating that the tachometer measures rotational speed is accurate, and when framed as a true statement, it aligns perfectly with its intended function in vehicle operation and instrumentation.