Which item is described as using rubber O-rings and sealant to prevent moisture entry and corrosion?

Which item is described as using rubber O-rings and sealant to prevent moisture entry and corrosion?

• A. Magnesium Surfaces
• B. Water Entrapment Areas
• C. Spot Welds
• D. Electronic Connectors

Answer: (D)

Electronic connectors are designed to keep moisture and contaminants out to prevent corrosion and electrical problems. Rubber O-rings sit in a groove and compress when the connector halves mate, creating a tight seal. Sealants are often applied around the joint areas to fill gaps and block any residual path for moisture. This combination is specifically used for connectors because the environment avionics face—humidity, rain, salt spray, and temperature changes—demands a reliable seal to maintain electrical integrity. Magnesium surfaces are prone to corrosion and are usually protected by coatings or anodizing rather than relying on O-rings and sealants in the connector itself. Water entrapment areas refer to places where water can accumulate and cause issues, not a component described as using sealing methods to prevent entry. Spot welds are a type of joint and aren’t inherently sealed with O-rings or sealants to stop moisture ingress.

Electronic connectors are designed to keep moisture and contaminants out to prevent corrosion and electrical problems. Rubber O-rings sit in a groove and compress when the connector halves mate, creating a tight seal. Sealants are often applied around the joint areas to fill gaps and block any residual path for moisture. This combination is specifically used for connectors because the environment avionics face—humidity, rain, salt spray, and temperature changes—demands a reliable seal to maintain electrical integrity.

Magnesium surfaces are prone to corrosion and are usually protected by coatings or anodizing rather than relying on O-rings and sealants in the connector itself. Water entrapment areas refer to places where water can accumulate and cause issues, not a component described as using sealing methods to prevent entry. Spot welds are a type of joint and aren’t inherently sealed with O-rings or sealants to stop moisture ingress.