UNITIZED STRUCTURAL BODY REPAIR- EXAM NEWEST

UNITIZED STRUCTURAL BODY REPAIR- EXAM NEWEST

ACTUAL / QUESTIONS WITH SOLUTIONS

VERIFIED/GRADED A+

Wax and Grease Remover - ----Answers----Used after soap and water. Removes tar, wax, silicones, and other petroleum based contaminants. Clean cotton rag and wipe dry with a second rag.

Metal Conditioners - ----Answers----Acid clean and etch the surface for the best possible adhesion of conversion coatings and primers. Do NOT use in enclosed areas where they can not be washed away.

Conversion Coatings - ----Answers----Follows the metal conditioners and lays down a zinc phosphate layer that maximizes primer adhesion as well as preventing rust "creep" under the painted surface. Not to be used in enclosed sections.

Epoxy Primers - ----Answers----Provides a level of corrosion protection closest to that of the original E-Coat primer. Must be applied soon after the cleaning, etching and conversion steps.

Induction Period - ----Answers----Some epoxy primers need to sit for a time after mixing.

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Self Etching - ----Answers----Eliminates the need for conditioners and conversion coatings. Must be top coated with a paint finish or anti corrosion compound.

Weld-Thru Primers - ----Answers----Restores the zinc protection that is burned away welding. Bonds tightly to bare metal and flows back into the weld site as it cools. Primers and seam sealers do not adhere to it so it must be removed.

Seam Sealers - ----Answers----Need to be replaced in any location that the manufacture applied them to. Same as what was used, and should be applied after the epoxy or self etching primers.

Wax and Petroleum Based Anti-Corrosion Compounds - ---- Answers----Applied to all enclosed sections and underbody surfaces.

Sacrificial Corrosion - ----Answers----Seal sacrifices itself against the elements.

Galvanic Corrosion - ----Answers----When 2 metals react to each other. Replace any special washers, films, gaskets to separate the two metals.

Structural Parts - ----Answers----Parts of the unibody that manage collision energy. They provide support for mechanical components and provide attachment points. (Hoods, Doors, Deck Lids, Etc.) All are structural to a degree.

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