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Test your basic knowledge |
Modern Material Science And Engineering 3
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 37 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. Polymeric matrix materials that are extremely expensive and used only in high end applications due to their ability to maintain their properties at temperatures above 250
isotropic laminar composite
prepreg
polyimide resins
ceramic matrix composites
2. Matrix material that have many voids and poor mehcanical properties but do offer a level of fire resistance
orientation of fibers
isotropic laminar composite
Fiber- reinforced composites
phenolic resins
3. 80% there is not enough matrix material to completely surround and bond with the fiber and transfer load effectively. - typical fiber fraction is about 30-50%
matrix
phenolic resins
resin transfer molding
fiber fraction exceeds
4. Quality of bonding between the fiber and the matrix in a composite material
Fiber- reinforced composites
prepreg
wet out
wet- filament winding
5. Resins used as matrixes in composite materials that are more expensive than polyester resin but provide improved mechanical properties and exceptional environmental resistance
epoxy resins
prepregging
prepreg
resin transfer molding
6. Composite materials produced with at least one phase that is a composite itself
hybrid composite
Fiber- reinforced composites
creel
polyester resin
7. Process of creating prepregs by dipping fibers into a resin bath and heating them sligtly to ensure that the coatin sticks
phenolic resins
prepregging
orientation of fibers
role of fibers
8. Condition in which the fibers in a matrix offer essentially no reinforcing benefit to the matrix when a load is applied in the transverse direction causing both to experience essentially the same strain
vinyl ester resins
fine aggregates
isostress condition
resin formulation
9. Hardening or toughening of a polymer material through a cross linking of polymer chains
polyester resin
metal matrix composites
prepregging
curing
10. Larger number of single fiber strands wound in parallel
roving
polyurethane
curing
phenolic resins
11. Premature failure in a composite caused by inadquate bonding b/t the fiber and matrix
fiber pull out
aspect ratio of fibers
phenolic resins
fine aggregates
12. Ratio of length to the diameter of the fiber used in a fiber inforced composite
creel
wet out
aspect ratio of fibers
Fiber- reinforced composites
13. Device capable of continuously pulling filaments from multiple different rovings without stopping the process
polyimide resins
composite
creel
ceramic matrix composites
14. Most economical choice for matrix material in composite in situations where the mechanic properties of the matrix are not crucial to the application
polyester resin
Fiber- reinforced composites
polyurethane
creel
15. Material in a composite that protects - orients - and transfers load to the reinforcing material
roving
matrix
resin formulation
polyester resin
16. Aggregate particles with a diameter less than 0.25 inches
roving
polyimide resins
isotropic laminar composite
fine aggregates
17. Addition of ceramic fibes to a matrix of different ceramic material to significantly increase the fracture toughness of the composite
isotropic laminar composite
curing
creel
ceramic matrix composites
18. Process of converting mats or weaves into composites through using a mold in which the mat is placed and jnjected with resin at a high enough pressure to permeate and surround the woven mat
prepregging
wet- filament winding
fiber pull out
resin transfer molding
19. Process of creating more complicated shapes of fiber- inforced composites into desired shape
resin transfer molding
isostress condition
wet- filament winding
coarse aggreagates
20. Composite in which the one material forms the outer matrix and transfers any loads applied to the stronger more brittle materials
roving
metal matrix composites
Fiber- reinforced composites
orientation of fibers
21. Level of chemical resistance - but weak in compression
Fiber- reinforced composites
fiber fraction exceeds
creel
polyurethane
22. Process in which bits of chopped up fibers are mixed or blown into the matrix material along with any curing agents - accelerators - diluents - fillers - or pigmnets - in order to form a simple choped fiber composite
isotropic laminar composite
resin formulation
vinyl ester resins
isostress condition
23. Process often used to create uniaxial fiber inforced composites
polyimide resins
orientation of fibers
pultrision
polyester resin
24. Composites that are made by alternating the layering of different materials bonded to each other
osseonintegration
ceramic matrix composites
phenolic resins
isotropic laminar composite
25. Ceramics - high performance polymers - metals - or carbon fibers
hybrid composite
prepregging
what are reinforced fibers made of...
polyurethane
26. Process in which hydroxy apatite becomes part of the growing bone matrix
osseonintegration
hardener
epoxy resins
curing
27. Polymeric matrix material that combines the economic advantages of polyester resins and the exceptional properties of epoxy resins
vinyl ester resins
creel
isostress condition
Fiber- reinforced composites
28. Material formed by blending two materials in distinct phases causing a new material with different properties from either parent
orientation of fibers
isostrain condition
fiber pull out
composite
29. Fiber bundle already impregnated with matrix material which can be converted into a composite without any additional processing
isotropic laminar composite
prepregging
curing
prepreg
30. Aggregage particles with a diamter greater than 0.25 inches
hybrid composite
wet out
creel
coarse aggreagates
31. Hard randomly oriented particles in a particulate composite that help the composite withstand compressive loads
aggregate
fiber fraction exceeds
epoxy resins
polyurethane
32. Composite that contain large numbers of coarse particles such as cement and gravel found in concrete.
particulate compostie
ceramic matrix composites
resin transfer molding
fiber pull out
33. Condition where the quality of bonding b/t the fiber and matrix is sufficient that both elongate at the same rate and experience the same strain
what are reinforced fibers made of...
creel
pultrision
isostrain condition
34. Composites that use a metal as the matrix material in place of more common polymer matrices
coarse aggreagates
metal matrix composites
wet- filament winding
orientation of fibers
35. Withstand significant tensile loads in the longitudinal direction
role of fibers
fine aggregates
pultrision
isostress condition
36. Uniaxial (along the load) - randomly oriented chopped fibers - complex two- dimensional or three- dimensional woven mats
resin transfer molding
resin formulation
orientation of fibers
prepregging
37. Substance added to epoxy resin to cause it to cross link the hardener becomes incorporated in the resulting polymer
hardener
prepregging
ceramic matrix composites
resin formulation