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Imse 250 exam 3 (1).
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Imse 250 exam 3 (1).
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Imse 250 exam 3Which is airplane has 3 engines?
A) boeing 777 B)boeing787
C) MD11 D) airbus A340 - ANS-C
A mudbrick is one of composite materials. It belongs to which of type of composite?
A) fiber composite B) particle composite
C)laminar composite D) none of above - ANS-A
The density of titanium alloy is generally _____ than that of steel.
A) higher B) lower - ANS-B
Which one of following area has the largest composite consumption ?
A)space & defense B)commercial aerospace
C) industrial D) electronic - ANS-B
Which of the following statements is not true?
A) 1D reinforcement gives max strength in 1 direction
B) the same textile of glass fiber has higher tensile strength
C) isotropic gives strength equally in all directions - ANS-B
What is the major function of fibers in a fiber composite material ? - ANS-Support load
Which one is not a major function of matrix in a fiber composite material?
A) hold fibers in right positions
B) transfer load to fibers
C) support load
D ) protect fibers - ANS-C
The best woven direction of carbon fibers in a structural component that has to withstand high
torque is ______ degree to the length of the component . - ANS-45
Additive manufacturing (am) is known by many names; which one of the following is not known
as an AM process ?
A) rapid prototyping
b ) 3d printing
C) photolithography - ANS-C
Which form of the following manufacturing method has the longest history ?
A) subtractive
B) fabricative
, C) formative
D) additive - ANS-A
According to the definition of additive manufacturing given by ASTM, why CNC turning is not
considered as an AM process?
A) not fabricating a 3d part directly from CAD model
B) not in a layer by layer additive fashion - ANS-B
T/f. Additive manufacturing technologies can only produce nonmetal parts? A) true B) false -
ANS-B
T/f. Additive manufacturing can both produce prototypes and final products. A) true b) false -
ANS-A
Additive manufacturing technologies can shorten the time to market significantly. According to
mckinsey associates, if a product is late to market by 6 months, already ——- of its gross profit
margins are lost.
A) 1/3 b) 1/2 c) 2/3 - ANS-C
What is the material to make emma's magic arm ?
A) pp b) ABS c) pc - ANS-B
How long does it take for bmw to produce an aluminum fixture using cnc machining ?
A) 1.5 days b) 10 days c) 18 days - ANS-C
In the video "using a 3d printer to make human body parts " how did dr atala generate the body
part computer model to be printed ? - ANS-Xray and 3d scanning
What are the two materials in the ink to print the body part? - ANS-Cells and biomaterial gel
Who developed the first bioprinter and filed the first cell-printing patent?
A) charles hull b) anthony atala
C) thomas boland - ANS-C
The first 3d printed is based on which technology ?
A) laser cured photopolymerization
B) fused deposition modeling of thermoplastics
C) metal powder sintered by high power laser beam - ANS-A
Regenerative medicine methods use a patient's own cells to rebuild a tissue or organ. In the
regeneration of the bladder, the cells were obtained through a ——.
A) blood draw
B) mri or ct
C) biopsy - ANS-C
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