FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

When creating advanced composite wet lay-ups, the ratio of fiber to resin is a crucial factor in determining the strength of the final product. While all of the options presented here may be used in different applications, a 6040 fiber to resin ratio is generally considered the best for strength. This is because it allows for a good balance of structural rigidity from the fibers and bonding strength from the resin. A 50:50 ratio may result in a weaker product due to too much resin and not enough fibers, while a 70:30 ratio may not have enough resin to bond the fibers effectively. The 40:60 ratio may also result in a weaker product due to insufficient fibers. Therefore, the 60:40 ratio provides the optimal balance for maximum strength in advanced composite wet lay-ups.