Ramsay Mechanical Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What does a tachometer measure?

Fuel consumption rate

Rotational speed of an engine or mechanical component

A tachometer is an instrument designed specifically to measure the rotational speed of an engine or a mechanical component, typically expressed in revolutions per minute (RPM). This measurement is crucial for various applications in automotive and industrial settings, as it helps operators and engineers monitor performance and ensure that machinery is functioning within safe operating limits.

Understanding the rotational speed can inform decisions related to the operation of the engine, such as shifting gears in vehicles, optimizing fuel efficiency, and preventing engine damage due to over-revving. Therefore, the primary function of a tachometer is to provide real-time feedback on how fast a component is rotating, which is essential for the effective management of mechanical systems.

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Torque being applied to an object

Pressure within a system

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