If a gauge is recalibrated, at what percentage deviation does it fail and must be replaced?

When a gauge is recalibrated, it is essential to ensure that it operates within accepted standards. A gauge may fail if its readings deviate beyond a specific percentage from the actual measurements. The correct answer indicates that a gauge must be replaced if it shows a deviation of 3%.

This threshold is established based on industry standards that ensure accuracy and reliability in measurements. A deviation of 3% is considered significant enough to compromise the integrity of the data collected with that gauge. Using a gauge that is beyond this limit could lead to faulty readings, which can have serious implications in applications like fire protection systems, where precise measurements are crucial for safety and compliance with regulations.

The other percentages, while suggesting possible thresholds, do not align with the established practices for replacement criteria. Thus, a 3% deviation serves as a critical benchmark in ensuring the operational efficiency and safety of the equipment.