IMSE 250 Final 5
According to the definition of composite material, is a
clear glass panel (assuming pure SiO2) considered
composite material? Why? - ANS-No, it is not a composite as it is a single chemical compound.
A composite material is a(n) ___________ solid consisting of two or more different materials
that are mechanically or metallurgically bonded together. - ANS-non-uniform
Concrete is regarded as a composite material because it is composed of a number of materials
(cement, aggregates, and sand) that combine to form this versatile building material. - ANS-True
In a fiber-reinforced polymer composite, such as CFRP and GFRP, the matrix material is
responsible for __________. - ANS-holding fibers together/in position
transferring load/force onto fibers
protecting fibers
According to ASTM, additive manufacturing is "a class of manufacturing processes where the
material is deposited in a ________ fashion to fabricate a 3D part directly from _________
model". - ANS-Layer-by-Layer
CAD
Please match the trademarked additive manufacturing process names with their ASTM category
names. - ANS-FDM = Material Extrusion
SLA = Vat Photopolymerization
DLP = Vat Photopolymerization
SLS = Powder Bed Fusion
SLM = Powder Bed Fusion
LENS = Directed Energy Deposition
Please match the stages of the digitalized files according to the AM process flow. - ANS-CAD
.STL
Slices
The main difference between a red LED (light-emitting diode) and a red diode laser is
__________. - ANS-The LED is not coherent but the laser is.
Which material has a higher absorptivity of CO2 laser? - ANS-Polycarbonate
A ________ system has high mobility and is more adaptive to be applied to repair and
re-manufacture damaged high-value metal parts serving at extreme conditions. - ANS-powder
fed laser engineered net shaping
According to the definition of composite material, is a
clear glass panel (assuming pure SiO2) considered
composite material? Why? - ANS-No, it is not a composite as it is a single chemical compound.
A composite material is a(n) ___________ solid consisting of two or more different materials
that are mechanically or metallurgically bonded together. - ANS-non-uniform
Concrete is regarded as a composite material because it is composed of a number of materials
(cement, aggregates, and sand) that combine to form this versatile building material. - ANS-True
In a fiber-reinforced polymer composite, such as CFRP and GFRP, the matrix material is
responsible for __________. - ANS-holding fibers together/in position
transferring load/force onto fibers
protecting fibers
According to ASTM, additive manufacturing is "a class of manufacturing processes where the
material is deposited in a ________ fashion to fabricate a 3D part directly from _________
model". - ANS-Layer-by-Layer
CAD
Please match the trademarked additive manufacturing process names with their ASTM category
names. - ANS-FDM = Material Extrusion
SLA = Vat Photopolymerization
DLP = Vat Photopolymerization
SLS = Powder Bed Fusion
SLM = Powder Bed Fusion
LENS = Directed Energy Deposition
Please match the stages of the digitalized files according to the AM process flow. - ANS-CAD
.STL
Slices
The main difference between a red LED (light-emitting diode) and a red diode laser is
__________. - ANS-The LED is not coherent but the laser is.
Which material has a higher absorptivity of CO2 laser? - ANS-Polycarbonate
A ________ system has high mobility and is more adaptive to be applied to repair and
re-manufacture damaged high-value metal parts serving at extreme conditions. - ANS-powder
fed laser engineered net shaping
