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Corrosion
Quiz 1
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Q.1
Technician A says that chip-resistant coating may be applied before the topcoat during repairs.Technician B says that chip-resistant coating may be applied over the topcoat during repairs.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.2
Which of these primers may contain zinc?
Epoxy
Self-etching
Weld-through
Wash
Q.3
Technician A says that it is generally recommended to apply undercoating to the bottom of the fuel tank.Technician B says that it is generally recommended to apply undercoating to the exhaust system.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.4
All of these are true about anti-corrosion compounds EXCEPT that they:
are applied inside aluminum cavities
should be cleared from drain holes
are usually topcoated
have self-healing capabilities
Q.5
Technician A says that one purpose for heavy-bodied seam sealers is for vertical joints.Technician B says that one purpose of a seam sealer is to prevent fumes from entering the passenger compartment.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.6
Coating of Zn, Al and Cd on steel are _________ , because their electrode potentials are lower
Cathodic
Anodic
Not affecting
Expensive
Q.7
Technician A says that some undercoating material is water-based.Technician B says that undercoating is applied to a muffler heat shield.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.8
Technician A says that acid rain is a corrosion promoter.Technician B says that heat during GMA (MIG) welding is a corrosion promoter.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.9
Technician A says that self-etching primer is required before applying epoxy primer.Technician B says both mechanical and chemical cleaning is required before applying epoxy primer.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.10
Which of these usually requires the zinc coating to be removed on the entire flange?
Spot welds
GMA (MIG) plug welds
MIG brazing
Panel bonding
Q.11
Which of the following statement is TRUE regarding Anodic and Cathodic reactions?
Both reactions take place simultaneously
Both reactions take place one after another
Both reactions must occur at a different rate
Both reactions must occur at a fast rate
Q.12
Technician A says that when preparing aluminum parts, body hammers should be kept separate from those used for steel.Technician B says that when preparing bare aluminum parts, oxidation begins to form again after a couple of days.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.13
Technician A says that the basecoat may be applied directly over a self-etching primer.Technician B says that the acid in self-etching primer neutralizes as it dries.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.14
Which of these is a characteristic of weld-through primer?
Heat resistant
Etches into the metal
Must be wet for best performance
May be a two-part product
Q.15
Technician A says that some vehicle makers do NOT apply undercoating to the floor pan.Technician B says that some vehicle makers do NOT apply anti-corrosion compound to interior cavities.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.16
Which of these should be done to determine if a replacement part has E-coat?
Sand and check for a dusty residue
Wipe with solvent and check for pain transfer
Wipe with denatured alcohol and check for paint transfer
Heat with a heat gun and check for softening of the finish
Q.17
Technician A says that it may be necessary to treat the backside for corrosion at anchor clamp sites.Technician B says that it may be necessary to treat the backside for corrosion where paintless dent repairs were done.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.18
Technician A says that the presence of E-coat on replacement parts should be tested by lightly sanding.Technician B says that the presence of E-coat on replacement parts should be tested with a mild soap and water solution.Who is right?
Both A & B
Neither A nor B
A only
B only
Q.19
Technician A says that OEM service parts are E-coated similar to assembly line parts.Technician B says that OEM service parts may be E-coated using an outside supplier.Who is right?
A only
B only
Both A & B
Neither A nor B
Q.20
Technician A says that solvent-based seam sealers should be restricted from use in the passenger compartment.Technician B says that direct-to-metal seam sealers may be applied over minor corrosion.Who is right?
A only
B only
Both A & B
Neither A nor B
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