Second Week Exam Flashcards
1
Q
Conventional spray guns are poor because the transfer efficiency is only __% to __% .
The transfer efficency of a HVLP set to __psi at the nozzle is at least __% to __%
A
25 to 35
65 to 90
2
Q
What is the most common type of media used for sandblasting?
A
Silica sand
3
Q
A ___ grade of steel wool can be used on chrome and glass
A
000
4
Q
When sandblasting the distance should be approx _” to __” and the angle should be __ to __ degrees
A
8” to 12”
20
30
5
Q
Heavy bodied seam sealers are used to fill seams from _/_” to _/_”
A
1/8
1/4
6
Q
1 hp = _ cfm
A
4 cfm
7
Q
Wax oil should not be sprayed until?
A
all resfinishing procedures have been done
8
Q
Manufacturers reccomend using no coarser than __ grit for abrading the metal fill area
A
36
9
Q
When finding the year of the vehicle which digit of the VIN number is refered to?
A
10th
10
Q
The term ________ refers to any product used to prepare a vehicle surface for colour coats of paint.
A
undercoat
11
Q
Steel is a _______ metal, which means that it contains iron and is therefore magnetic.
A
ferrous
12
Q
Sanding paste and _______ ________ are used in surface preperation where a fine scratch is needed for adhesion purposes.
A
rubbing compound
13
Q
Where would short strand fiberglass filler be used?
A
Welds or extensive metal repair
14
Q
Fillers cure by ________ reaction.
A
Exothermic
15
Q
Composite repair material is usually a two-part material (resin and catalyst) that comes in _________ that fit into a specially designed applicator gun.
A
cartridges
16
Q
Use fillers to repair ______ imperfections no more than _/_” deep
A
minor
1/8”
17
Q
Urethane composite repair material is designed for _______.
A
mending
18
Q
Coated or galvanized steel is bare steel that has a ____ coating on one or both sides and acts as a non-ferrous material.
A
zinc
19
Q
The two types of tests you can conduct to figure out what kind of plastic your working with are
A
grind test
float test
20
Q
Banding is done using a verticle gun stroke at each end of the panel, and is made with a small spray fan of about _”
A
4”
21
Q
The average HVLP gun requires an air compressor capable of producing between __ and __ cubic feet of air.
A
15 to 25
22
Q
What is a Cyanoacrylate?
A
Crazy glue
23
Q
Wet sandpaper uses _______ carbide mineral particles on grits above 1000 and ______ oxide particles on grits 220-800.
A
Silicon
Aluminum
24
Q
Hold you block at a __° angle
A
30
25
Remember if its a \_\_\_\_\_\_, use a promoter.
floater
26
HVLP guns are designed to operate at __ psi to __ psi
12 to 43
27
Body filler used mechanical adhesion to stick, or \_\_\_\_.
bite
28
\_\_\_\_\_\_\_ is defined as the ability of a liquid to resist flow.
Viscosity
29
Sanding materials for a blend include _____ \_\_\_, sanding paste, _______ \_\_\_\_\_\_\_\_ and sandpaper
scuff pads
rubbing compound
30
Chip-resistant coatings come in two different types which are?
Spray-on
Clear adhesive plastic (3m)
31
You should always back sand \_" to \_\_" farther out from where the primer is to be sprayed.
8" to 12"
32
Undercatalyzation is caused by not using enough \_\_\_\_\_\_.
Hardener
33
\_\_\_\_\_\_\_\_\_\_ need a special adhesion promoter to help the repair material bond properly.
Thermoplastics
34
Guide coats come as either _____ or ___ \_\_\_\_\_\_\_.
aerosol
dry powder
35
Brushable seam sealer is a heavy-bodied sealant that is applied with a stiff-bristled _____ on seams where appearance is not important.
brush
36
Make sure the vehicle is at \_\_°c before applying filler.
21
37
1 mil equals \_/\_\_\_\_"
1/1000"
38
Incorrectly repairing surface preperation or applying filler more than \_/\_" may cause the filler to crack.
1/8"
39
What are microbeads?
They are hollow glass bubbles in lightweight body filler. They come in many different sizes and densitys.
40
Chalking is used to describe an old finish that has ________ over time.
deteriorated
41
Most faults in body filler are caused by ____ \_\_\_\_\_.
Human Error
42
43
For catalyzed products, you need a minimum temperature of \_\_°F (\_\_°C) in order for the isocyanates to react and cure the product
60
15
44
Paint cracking is a series of deep _____ ressembling mud cracks in a dry pond.
cracks
45
Do not blob body filler on all at once. This causes poor ______ and traps air, which causes ________ and cracking.
adhesion
pinholes
46
Methyl ethyl ketone peroxide is a clear liquid hardener used with?
Liquid fiberglass resins
metal fillers
47
Plastic bead blasting is great for removing rust
True or False
False
Plastic bead blasting does not remove rust
48
Dry sandpaper is usually classified as an open coat type of paper, which means that the _______ oxide particles are placed apart from each other to permit sanded materials to flow out of the sandpaper
Aluminum
49
Always use \_\_\_-\_\_\_\_\_\_ cleaning tools for your spray guns
non-metallic
50
Ultraviolet primers cure in _ to _ minutes
1 to 2
51
Apply stripper to one section at a time, up to _ feet square.
3 feet
52
When mixing products weight is expressed in \_\_\_.
grams
53
The two types of steel are \_\_\_-\_\_\_\_\_ and \_\_\_\_\_\_\_
non-coated
coated
54
A general rule for featheredging is that each layer of paint should be tapered approx \_" between coats
1"
55
It is necessary to follow paint manufacturer recommendations for preparing a substrate for undercoat or topcoat application.
True or False
True
56
The second step to cleaning a substrate before sanding is a _____ wash
solvent
57
Long strand filler is the same as short strand but the fibers are \_" to \_" long.
1" to 3"
58
The grinder wheel should be held so that the back of the disk is raised \_\_° off the metal.
20
59
Sheet-moulded compound (SMC) is a fiberglass-reinforced compound in sheet form. It is made by mixing chopped glass mat, resin, filler and catalyst together by placing it between two sheets of __________ film
polyethylene
60
The best way to remove paint is to use __ to __ grit sanding disk with an 8" foam back pad on an air wheel.
40
80
61
Name the 2 different ways to test for adhesion on a substrate
tape test
sand test
62
Leaving water on a substrate could leave behind ______ that can contaminate the cleaned sustrate.
deposits
63
Flexible polyester putty can be applied to plastic repairs to fill ______ and minor imperfections.
pinholes
64
Name 2 purposes for talc in bodyfiller
Provide sandibility
Thicken
Add body
Structural strength
65
Is the application of water-borne primer surfacer on flexible parts recommended?
No because elastomeric additives will not mix with water-borne products.
66
Dry sandpaper uses a ___ stearate solution in its finer grades to keep the sandpaper from loading up
zinc
67
What is the primary advantage of a microbead?
Sandability
68
Prior to sanding any substrate you should always clean with warm, _____ \_\_\_\_\_
soapy water
69
(TDS) _____ \_\_\_\_\_ ______ or (PDS) _____ \_\_\_\_\_\_ _______ are the information manuals for using any of your repair materials.
Technical Data Sheets
Product Data Sheets
70
Overcatalyzation results when too much ______ is used.
hardener
71
Damaged or broken (FRP) fibre reinforced plastics should be covered to prevent _______ of the water and detergents into cracked, damaged or broken areas
wicking
72
Aluminum is a non-ferrous metal that is \_\_\_-\_\_\_\_\_\_.
non-magnetic
73
There are a few paint tests that you can conduct to determine the type of finish with which you will be working. Name them.
solvent test
sand test
74
A minimum of a _ horsepower air compressor is required to run a HVLP gun
5
75
For a cosmetic repair on SMC, sand the area with __ grit sandpaper to remove any paint within \_" of the repair, then bevel the area with a die or angle grinder to provide adequte area for bonding.
80
3"
76
what abrasive is used in sanding paste?
pumice
77
\_\_\_\_ ___ is the time required for solvent to evaporate before another coat of product can be applied.
Flash time
78
Methyl Ethyl Ketone Peroxide (MEKP) is a severe skin irritant that can cause ______ and ______ disorders.
Blindness
Respiratory
79
Peeling is caused by loss of ______ between any refinishing products such as primer, primer surfacer, sealer and topcoat.
adhesion
80
What is polyester putty/ 2k putty can be finished using \_\_\_-\_\_\_grit. 2k putty is designed for use as a skin coat over body filler to fill \_\_\_\_\_\_\_, deep scratches, low areas or other minor imperfections no deeper than \_/\_\_"
280-240
pinholes
1/32"
81
Guide coats allow you to see imperfections such as sand scratches, \_\_\_\_\_\_, orange peel and sharp dents that you would not be able to see by looking at undercoat alone.
pinholes
82
The most common composites are
plastic
fibre-reinforced plastic (FRP)
83
The thinner or less visious the material, or the lower the amount of solids in the product, the ____ the sanding needs to be.
finer
84
\_\_\_\_\_\_\_\_\_ is a process in which the sandpaper pad of the DA sander is placed on the the broken paint edge of a substrate and moved back and forth along the edge until the subsrate has been gradually tapered or a smooth edge acheived.
Featheredging
85
When doing a plastic repair the bevel should be approx \_\_° and bevelled back \_/\_" to \_/\_" to create a better surface area for adhesion
30
1/4
3/8
86
Paint is measured in \_\_\_\_
mils
87
Name the 2 types of talc used in fillers
Platelet talc
Round Talc
88
Name a few composite repair materials.
rigid plastic repair
flexible plastic repir
ridgid SMC fiberglass repair
89
Name 3 things Benzoyl Peroxide hardener (colored) is used in.
Lightweight body fillers
Short strand filler
Long strand filler
Flexible polyester putty
Soe SMC and fiberglass compatible resins
90
The best way to repair a pinhole is to use a 1/8" ____ \_\_\_ or the corner of a razor blade to carve out the hole.
drill bit
91
Blistering appears as small, \_\_\_\_\_
areas on the surface that ressemble water blisters on human skin.
swelled
92
\_\_\_\_\_ are the first stage in any undercoating process
primers
93
Name one result caused by undersanding
shiny spots
incomplete surface sanding or levelling
unsanded edges
94
On the first application of filler hold the spreader at \_\_° angle in the direction of pull.
60
95
Substrate is defined as an _______ layer.
underlying
96
\_\_\_\_\_\_\_ is used to remove paint and clean bare metal with little overlap of sanding marks.
Buffing
97
Epoxy-based composite repair material has good _____ qualities for ______ repairs.
filling
cosmetic
98
What does marbleize mean?
If the filler and hardener are not mixed to a uniform color, soft spots will form in the cured filler.
99
A ____ \_\_\_ is created by featheredging bodywork, chips, and scatches improperly.
bulls eye
100
Aluminum body and frame panels are usually \_.\_ to _ times thicker than steel parts
1.5
2
101
Typically, if there is 100 parts body filler there should be _ parts hardener.
2
102
Name 1 thing a solvent wash does
dissolve the contamination
float the contaminants to the surface
suspend the contamination in the liquid solution
103
What is long strand fiberglass filler used for?
It is used for final-shaping fibergalass panels ater the resin and matting have been laid.
104
Spray-on chip-resistant coating, also known as ___ \_\_\_\_\_
rock gaurd
105
What is deflection?
When metal dents, an area around the impact is drawn toward the damage causing a bigger dent than it looks like.
106
What is a sureform file used for?
To cut through the resin and excess filler to contour quickly.
107
When sanding anything you want to stay within a __ grit jump.
100
108
The painted area should be removed with the sanding disk for \_" to \_" around the area to be filled.
3"
4"
109
Fibre-reinforced plastic (FRP) is a composite material made up of a _____ or combination of ____ and reinforced with \_\_\_\_\_.
polymer
resins
fibers
110
The abrasive travels through one hose while high velocity air of 50 psi to 80 psi and up to 150 psi travels through another.
What type of sandblaster is this?
Pressure blaster
111
Hybrid plastics are defined in two categories, which are
thermoplastic
thermoset
112
Short strand filler has resins and short lengths under \_" of chopped _______ filler
1"
Fiberglass
113
Always refer to the product manufactures ____ \_\_\_\_ for final grit recommendations.
data sheets
114
Name 2 things a chemical stripper should not be used on
plastic parts
anodized aluminum
FRP panels
Flexible parts
Rubber trim
Upholstery
Plexiglass
115
Body filler is a paste composed of polyester resin blended with ____ and ________ fillers.
Talc
Microbead
116
Name the 2 types of resin that can be used to perform composite repairs.
Urethane
Epoxy
117
Microchecking is the beginning of ____ breakdown and could be an indication that film failures such as cracking or crazing will develop.
film
118
The spray gun is a precision engineered and maufactured instrument that _______ materials with compressed air and allows the material to be transferred to the surface being primed.
atomizes
119
One way to check a spray pattern is with the ______ test method .
flood or static
120
(OEM) and most aftermarket manufactures now coat their body components with ____ deposition primer (EDP)
Electro
121
Air lines with an inside diameter of \_/\_" is recommended for an HVLP gun.
3/8"
122
Standard __ and _____ removers used for metal substrates are highly flammable and should not be used on composites.
wax and grease
123
When preparing a gouge or scratch on plastics, start with __ to __ grit Roloc disk on an angle grinder or a die grinder, and then _____ out the scratch.
36
50
bevel
124
125
Metal etching primers are sometimes called _______ primers.
straight
126
Metal filler is resin based with actual ______ particles.
aluminum
127
A typical OEM BC/CC finish is _ mils to \_.\_ mils
5
7.5
128
Is Methyl Ethyl Ketone Peroxide considered a carcinogen? Yes or No
Yes
129
The recommended time to leave a solvent on a substrate is __ seconds to ______ minutes.
15
several
130
Name the one main charcterisic of primer surfacer
sandable
131
A rule of thumb is to hold the gun \_" to \_" away when spraying an HVLP gun
6 to 8"
132
As a general rule, for each golfball sized glob of filler, use \_" bead of hardener
1"
133
In the fill area manufacturers recommend a __ to __ grit grinding disk, using a \_\_\_\_\_-\_\_\_ pattern to prepare the area
36
50
134
When chemical stripping, and moldings and name plates cannot be removed, they should be covered adequately with tape extending \_" beyond the edge of the nameplate
1"
135
When banding, keep the spray gun \_" to \_" closer than the normal distance to the panel.
1" to 2"
136
Grit selections for circular sanders usually range from __ grit to ___ grit
36 to 100
137
The hardener must be mixed before use, this is known as \_\_\_\_\_\_\_.
kneading
138
What is metal filler used for?
aluminum repairs
139
Flex additives are also called ________ additive
elastomeric
140
Scuff sanding is used to remove all the small imperfections such as \_\_\_\_, dirt, ____ \_\_\_\_\_ and other minor imperfections from the surface.
lint
orange peel
141
\_\_\_ ____ is the time required for the solvent to completly evaporate from a product
Dry time
142
Fiber reinforced plastics should be sanded ____ only.
dry
143
Do not use \_\_\_\_\_, as the styrene in the filler will loosen any chemicals or wax in the _______ and cause it to break down and contaminate the filler. Any liquid from the filler or hardener will also be absorbed by the \_\_\_\_\_\_\_\_.
Cardboard
144
All body fillers are _________ resin based (plastic)
thermoset
145
Its okay to grind areas that will not be covered by filler.
True or False
False
Do not grind areas the will not be covered by filler.
146
Name 2 charcteristics of aluminum oxide
reddish brown
extremly tough and durable
able to resit fracturing and dulling on harder finishes
popular in coarse grits for grinding metal, stripping old paint and shaping body filler
used in paper and disk form
preffered to use with todays BC/CC finishes
147
A paint film of __ mils to __ mils is to thick and the paint should be removed chemically or abraded off with a coarse sand paper.
12
14
148
As part of the surface evaluation, you must also determine whether the vehicle has been repainted. There are 3 ways to determine this, name 2
visual inspection
the sanding method
the paint film thickness
149
When _______ is added to primer surfacer, it speeds up the rate of cure.
accelerator
150
Name 2 characteristics of zirconia alumina
bluish grey
rugged, synthetic non-metal abrasive
blockier, but sharper grain than aluminum oxide
comes in paper sheet and disk form
very well suited for heavy grinding and sanding
provides free, cool cut, which results with less loading
self-sharpening action as it breaks down
requires less sanding pressure
more cost effective alternative to traditional silicon carbide and luminum oxide
longest lasting of all abrasives
151
Do not ___ or ___ the body filler. It will add to much air, which will create pinholes.
whip
stir
152
The two main types of abrasives used in dry sanding operations are
\_\_\_\_\_\_\_ oxide
\_\_\_\_\_\_\_ alumina
aluminum
zirconia
153
Light bodied seam sealers are used to fill seams less than \_/\_"
1/8
154
name 2 charcteristics of silicon carbide
Bluish black
it is very sharp (needle like) deep penetrating abrasive
it lasts very well on painted surfaces
it breaks down and dulls readily when used on steel and other hard materials
it is usually a finer grit
155
Solid seam sealers, otherwise known as _____ caulking or \_\_-\_\_ are used to fill voids at panel joints or holes.
strip caulking
Dum-Dum
156
Composite solvent cleaners are different from standard solvent cleaners in that they are typically \_\_\_-\_\_\_\_\_\_\_ or much less ______ than standard cleaners.
non-flammable
flammable
157
You should wear a respiratory system when wet sanding. True or False
False
It does not produce any dust so there is no need for a respiratory system.
