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Chapter 18: Fabrication Processes and Materials
Copyright Cengage Learning. Powered by Cognero.
Page 1
1. A type of fabrication that adheres materials together by interlocking the surfaces is called ____.
a.
chemical adhesion
b.
mechanical adhesion
c.
mechanical fastening
d.
friction fitting
ANSWER:
b
2. Although mechanical adhesives come in various forms, they must be ____ during the bonding operation.
a.
completely mixed
b.
cool
c.
heated
d.
liquid or semiliquid
ANSWER:
d
3. What adhesive was used in ancient times to seal cracks in boats?
a.
pitch
b.
shellac
c.
wax
d.
natural rubber
ANSWER:
a
4. A rapid-setting acrylic adhesive that polymerizes when pressure is applied to the joint is ____.
a.
polyvinyl alcohol
b.
N,N-dimethylformamide
c.
cyanoacrylate
d.
polyvinyl butyral
ANSWER:
c
5. The interlayer of safety glass is made of ____ because it has excellent adhesion to glass.
a.
polyvinyl acetal
b.
polyvinyl butyral
c.
polyvinyl acetate
d.
polyvinyl formal
ANSWER:
b
6. One very popular modern polyvinyl acetate adhesive is ____ which is used by carpenters, artists, secretaries, and many
other people.
a.
cellulose acetate
b.
Duco® cement
c.
white glue
d.
cellulose butyrate
ANSWER:
c
7. What is a disadvantage of hot-melt adhesives?
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Chapter 18: Fabrication Processes and Materials
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Page 2
a.
particle boards
b.
leather shoes
c.
safety glass
d.
marine plywood
ANSWER:
d
8. Urea-formaldehyde is a type of amino resin used in the manufacture of ____.
a.
particle boards
b.
leather shoes
c.
safety glass
d.
marine plywood
ANSWER:
a
9. High grades of exterior and marine plywood are bonded with ____.
a.
polyvinyl acetate adhesives
b.
cellulosic adhesives
c.
phenolic resins
d.
resorcinol-formaldehyde resins
ANSWER:
d
10. What is a thermosetting plastics adhesive available in two-part paste components?
a.
cellulosic adhesives
b.
phenolic resins
c.
epoxy resins
d.
resorcinol-formaldehyde resins
ANSWER:
c
11. An example of an elastomeric adhesive is ____.
a.
caulk
b.
epoxy resin
c.
phenolic resin
d.
Duco® cement
ANSWER:
a
12. Cartridges such as these, containing caulks or sealants are types of _____ adhesives.
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Chapter 18: Fabrication Processes and Materials
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a.
amino resin
b.
epoxy resin
c.
elastomeric
d.
cellulosic
ANSWER:
c
13. In chemical adhesion, the adhesive process is maintained by ____.
a.
electrostatic forces
b.
catalysts
c.
molecular valence forces
d.
ionic bonding
ANSWER:
c
14. Spin welding is a friction method of joining ____ thermoplastic parts.
a.
solvent-based
b.
polymeric
c.
monomeric
d.
circular
ANSWER:
d
15. Dielectric bonding is most likely to be used to bond ____.
a.
ABS
b.
polyethylene
c.
polystyrene
d.
fluoroplastics
ANSWER:
a
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Chapter 18: Fabrication Processes and Materials
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16. What type of frictional heating technique uses ultrasonic means to place metallic inserts into plastics parts?
a.
staking
b.
spot bonding
c.
insertion bonding
d.
dielectric bonding
ANSWER:
c
17. Similar to hot-gas welding, ____ uses heated air to soften posts that typically extend through holes in mating parts.
a.
heat staking
b.
heated-tool welding
c.
impulse bonding
d.
electromagnetic bonding
ANSWER:
a
18. Which method comprises the process of similar materials being heated and the joints brought together while in the
molten stage?
a.
electromagnetic bonding
b.
heat staking
c.
impulse bonding
d.
heated-tool bonding
ANSWER:
d
19. Which method may be thought of as a heated-tool method that does not use continuously heated tools?
a.
electromagnetic bonding
b.
heat staking
c.
impulse bonding
d.
heated-tool bonding
ANSWER:
c
20. What type of fasteners are pictured here?
a.
self-threading
b.
threaded metal inserts
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Chapter 18: Fabrication Processes and Materials
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Page 5
c.
standard bolts
d.
pull mandrels
ANSWER:
a
21. A fastening technique in which plastic or metallic parts are inserted into other plastics components, sometimes while
the plastics are still warm, is ____.
a.
press fitting
b.
snap fitting
c.
shrink fitting
d.
transfer fitting
ANSWER:
a
22. In both press and snap fits, one of two parts is made smaller so that the two cannot fit together without force. The
intentional differences in the two part dimensions are called ____.
a.
interferences
b.
allowances
c.
tolerances
d.
integrations
ANSWER:
b
23. Which gas can be used for hot-gas welding when it is essential to prevent oxidation and achieve strong welds?
a.
hydrogen
b.
helium
c.
nitrogen
d.
argon
ANSWER:
c
24. The solvent often found in white glue is ____.
a.
water
b.
acetone
c.
cyclohexane
d.
chloroform
ANSWER:
a
25. The type of bonding that is common in the packaging industry because it is often used on materials that will not stay
bonded unless they are held together while cooling is ____.
a.
electromagnetic bonding
b.
heat staking
c.
impulse bonding
d.
heated-tool bonding
ANSWER:
c
