| Question | Answer |
| Which of these materials is the most cathodic?
A) Zinc
B) Stainless steel
C) 2024 aluminum alloy | stainless steel |
| Select the solvent used to clean acrylics and rubber.
A) Methyl ethyl ketone
B) Aromatic naphtha
C) Aliphatic naphtha | aliphatic naphtha |
| A TSO is issued by who?
A) The aircraft industry
B) The administrator
C) Part manufacturers | the administrator |
| A non-electrolytic chemical treatment for aluminum alloys to increase corrosion resistance and paint bonding qualities is called
A) alodizing
B) dichromating
C) anodizing | alodizing |
| When an anodized surface coat is damaged, it can be partially restored by
A) chemical surface treatment
B) applying a thin coat of zinc chromate primer
C) use of a suitable mild cleaner | chemical surface treatment |
| What may be used to remove corrosion from highly stressed steel surfaces?
A) fine grit aluminum oxide
B) steel wire brushes
C) medium grit carborundum paper | fine grit aluminum oxide |
| In order to reconstruct lost/destroyed records, what's needed?
A) TT of airframe
B) Dates of all maintenance/alterations
C) Dates/times of all inspections | TT of airfame |
| Fretting is most likely to occur when
A) 2 surfaces fit loosely together but move
B) 2 surfaces fit tightly together but still move
C) only when 2 dissimilar metals touch | 2 surfaces fit tightly together but still move |
| Select the solvent used for wipedown of cleaned surfaces before painting.
A) dry-cleaning solvent
B) aromatic naphtha
C) aliphatic naphtha | aliphatic naphtha |
| Galvanic corrosion is severe when:
A) the surfaces are the same size
B) the anodic material is smaller
C) the cathodic material is smaller | the anodic material is smaller |
| One way of obtaining stress corrosion cracking resistance is
A) creating compressive stresses on the surface
B) producing stress during cold-working
C) relieving compressive stresses on the surface | creating compressive stresses on the surface |
| 1. In the corrosion process, only the cathodic area corrodes
2. In the Galvanic or Electro-Chemical Series for metals, anodic metals give up their electrons easily
Which, if any, are true? | only #2 |
| A primary purpose of intergranular corrosion is
A) improper application of primer
B) dissimilar metal contact
C) improper heat treatment | improper heat treatment |
| What records must be retained for at least one year or until the work is repeated/superseded?
A) records of inspection status, including time since last one
B) records of maintenance and inspections
C) records of time since overhaul of items | records of maintenance and inspections |
| Which of these metals is the most anodic?
A) Magnesium
B) 7075-T6 aluminum alloy
C) cadmium | magnesium |
