SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
Modern Material Science And Engineering 2
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Pigments or dyes that change the way light is absorbed or reflected by a polymer
polyamides
acrylic
coloring agents
oligomers
2. Covalently bonded chains of molecules with small monomer units repeated from end to end
injection molding
viscose process
polymers
homopolymer
3. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
shot size
atactic
relative molecular mass RMM
block copolymers
4. Two or more polymers mechanically mixed together but without covalent bonding between them
quenching
tow
blends
branching
5. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
viscose process
copolymer
relative molecular mass RMM
alternating copolymers
6. First step in the process of polymerization - during which a free radical is formed
blends
primary termination
petroleum
initiation
7. Number of bonds a molecule has formed
asymetric
vulcanization
functionality
pigments
8. Molecule containing a highly reactive unpaired electron
asymetric
tacticity
free radical
rayon
9. Polymers comprised of two or more different monomers that attach to the chain in long runs of one type of monomer - followed by another monomer AAAAAAAAAAAAABBBBBBBBBBBBBBBBBBAAAAAAAA
shot size
number average molecular weight Mn
block copolymers
thermosets
10. Process of pushing polymers through a spinneret and winding the solidified fibers onto a tow - which imposes a shear stress on the fibers upstream as they emerge from the spinneret
polymer backbone
staggered conformation
hopper
melt spinning
11. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
acrylic
vinyl monomer
tow
atactic
12. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
isotactic dan
plasticizers
termination
vulcanization
13. Is not asymetric and cannot have multiple configurations
any carbon with double bonds or repeated substituents
step- growth/condensation polymerization
solution spinning
monomers
14. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)
polyurethanes
cracking
plasticizers
elastomers
15. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
stabilizers
secondary bonding
coloring agents
freeze line
16. One method of expressing the molecular weight of sample of polymers with averaging based on weight; this method is more useful when large molecules in the sample dominate the behavior
weight average molecular weight Mw
step- growth/condensation polymerization
extruder
spinneret
17. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance
condensation/step- growth polymerization
High volume thermoplastics HVTP
polypphenylene terephyhalamide PPTA
monomers
18. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
polyurethanes
screen pack
plyacrylonitrile PAN
viscose process
19. One of the two different types of termination in the polymerization process. during this type of termination - the free radicals from two different polymer chains join to end the propogation process
configuration
polymers
vulcanization
mutual termination
20. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
polypphenylene terephyhalamide PPTA
plasticizers
spinneret
thermoplastics
21. Broad category of polymers that includes polymers containing urethane linkages
polyurethanes
atactic
die
relative molecular mass RMM
22. Formation of side chains along the backbone; presence of branches disrupts the interactions beween adjacent chains; lowering the tensile strength - melting point - stiffness - crystallinity - and density
elastomers
cracking
primary termination
branching
23. One type of polymer that contains at least 85% of polyacrylonitrile PAN
thermoplastics
acrylic
propagation
block copolymers
24. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
side groups/ substituents
tow
polymer backbone
copolymer
25. Covalent bonding of the polymer backbone and side groups
solution spinning
primary termination
conformation
primary bonding
26. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
poly- p- phenylene benzobisoxazole PBO
viscose process
blends
syndiotactic dyad
27. Conformation in which the largest substituents are offset by 180
trans - conformation
thermoplastics
polyurethanes
functionality
28. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
elastomers
shot size
homopolymer
polyviyl chloride PVC
29. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
thermosets
atactic
configuration
additives
30. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
polypphenylene terephyhalamide PPTA
vinyl monomer
conformation
die
31. Arrangement of the largest substituents where the substituets are offset by 120
staggered conformation
cracking
step- growth/condensation polymerization
mutual termination
32. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
propagation
alternating copolymers
condensation/step- growth polymerization
isotactic dan
33. Formation of a plymer that occurs when two potentially reactive end groups on a polymer react to form a new covalent bond between the polymer chains. this reaction also forms a biproduct - usually water
eclipsed conformation/ cis - conformation
primary termination
polyesters
condensation/step- growth polymerization
34. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
nylon
mutual termination
dyes
High volume thermoplastics HVTP
35. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyviyl chloride PVC
eclipsed conformation/ cis - conformation
atactic
side groups/ substituents
36. Carbon atom capable of multiple configurations due to four different substituents
asymetric
staggered conformation
injection molding
any carbon with double bonds or repeated substituents
37. Double bounded organic molecule used to begin addition polymerization
blends
vinyl monomer
tacticity
solution spinning
38. Long chain polymers that contain at least 85% of an ester of a substituted aromatic carboxylic acid. these fibers are strong and can dyed or made transpared
number average molecular weight Mn
polyesters
weight average molecular weight Mw
relative molecular mass RMM
39. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
quenching
addition polymerization/chain growth/free- radical polymerization
aramid
polymethylmethacrylate PMMA
40. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
condensation/step- growth polymerization
termination
monomers
aramid
41. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
extruder
High volume thermoplastics HVTP
monomers
melt spinning
42. Primary raw material for most polymers
cracking
petroleum
stabilizers
shot size
43. Number of repeat/structural units in a polymer chain
vinyl monomer
degree of polymerization DPn
gauche conformation
addition polymerization/chain growth/free- radical polymerization
44. An acid and an alcohol
side groups/ substituents
melt spinning
most common condensation/step- growth polymerization occur between....
block copolymers
45. Additives whose primary purpose is to reduce the final cost of the product
fillers
plyacrylonitrile PAN
free radical
degree of polymerization DPn
46. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property
fillers
additives
number average molecular weight Mn
any carbon with double bonds or repeated substituents
47. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
rayon
primary bonding
degree of polymerization DPn
plasticizers
48. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
most common condensation/step- growth polymerization occur between....
eclipsed conformation/ cis - conformation
dyes
block copolymers
49. Simple polymeric material produced as pellets in large quantities
viscose process
trans - conformation
High volume thermoplastics HVTP
quenching
50. Polymer made up of two of more differenet monomers covalently bonded together
copolymer
primary termination
aramid
rayon