How should gauges be inspected for corrosion or leakage?

• A. Visually inspect for color change.
• B. Visually inspect, ensure legibility, check for cracks or wear, and inspect the connection point.
• C. Only check for cracks.
• D. Ignore corrosion.

Answer: (B)

Gauges should be checked with a thorough visual inspection that covers both the instrument itself and its connection to the system. Look for any signs of corrosion on the gauge body, stem, and fittings, plus any evidence of leakage such as dampness, stains, or residue around the connection point. Make sure the gauge face and numbers are legible so you can read the pressure accurately. Also inspect for cracks, wear, or damage to the dial, bezel, or mounting, and check the connection point for looseness or damaged threads. This broad check catches problems that color changes alone might miss and ensures the gauge readings you rely on are trustworthy. Avoid relying solely on color change, as corrosion and leaks can occur without visible discoloration, and don’t ignore signs like cracks or a loose connection, which can lead to failure.