How should moisture-resistant seals be inspected?

• A. Check for cracks, gaps, deformation, and proper seating; verify seal integrity
• B. Clean and test for leakage with water
• C. Look only for obvious dirt and grime
• D. Measure the seal's color change

Answer: (B)

Moisture-resistant seals are evaluated by confirming they actually keep moisture out, not just by looking at them. Cleaning the area removes debris that could hide defects, and then performing a water leakage test directly checks whether the seal remains watertight under moisture exposure. This approach proves functional integrity rather than just appearance. Visual checks for cracks or gaps can miss hidden leaks, while looking for dirt or color change doesn’t reliably indicate seal performance. Therefore, the method that combines cleaning with a water leakage test best demonstrates the seal’s ability to resist moisture.