FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Question: 1 / 1030

The final cleaning when making repairs to fiberglass should be made using what?

Acetone

Alcohol

MEK (methyl ethyl ketone)

When making repairs to fiberglass, the final cleaning should be done using MEK (methyl ethyl ketone). MEK is a powerful solvent that effectively cleans the surface and removes any contaminants that could affect the adhesion of repair materials. Acetone and alcohol are commonly used for cleaning purposes as well, but MEK is preferred for cleaning fiberglass due to its strong cleaning properties. Soap and water may not be sufficient for thoroughly cleaning the surface before making repairs to fiberglass.

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Soap and water

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