THINKING LIKE AN ENGINEER W/ACCESS
17th Edition
ISBN: 9781323522127
Author: STEPHAN
Publisher: PEARSON C
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Textbook Question
Chapter 1, Problem 11RQ
- 11. What type of engineer is most likely to work on designing the fiber orientation of a composite for a new carbon fiber airplane?
- A. An
industrial engineer - B. A
mechanical engineer - C. A materials engineer
- D. An electrical engineer
- A. An
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Carbon fibers are used to reinforce with the matrix in the fiber-reinforced polymers.
Select one:
True
False
Answer the followings mcqs
a)Prepreg formation results in
Tape consisting of randomly oriented fibers
Sheet consisting of randomly oriented fibers
Tape consisting of continuous aligned fibers
Sheet consisting of continuous aligned fibers
b) In injection molding of thermoplastic composites:
Screw is straight and barrel is cold
Screw is tapered and barrel is heated
Screw is tapered and barrel is cold
Screw is straight and barrel is heated
c) Starting laminates for compression molding process is:
Sheet molding compound
Bulk molding compound
Both (a) and (b)
Prepreg
4) Which one of the following material can by recycled
a.
Polyesters
b.
epoxides
c.
PET
d.
Phenolic
Chapter 1 Solutions
THINKING LIKE AN ENGINEER W/ACCESS
Ch. 1 - 1. Which of these is closest to the definition of...Ch. 1 - 2. Which sentence best describes someone who is...Ch. 1 - 3. Which sentence best describes someone who is...Ch. 1 - 4. How do you Know you have chosen the right...Ch. 1 - 5. What is the goal of the Nitrogen Cycle Grand...Ch. 1 - Synthetic (human caused) conversion of nitrogen...Ch. 1 - 7. What type of engineer is likely to work on...Ch. 1 - 8. Which engineering field is primarily concerned...Ch. 1 - 9. What type of engineers are most likely to...Ch. 1 - 10. What engineer would be most likely to work on...
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- In gas welding process, rubber is used as preferred material for hoses. Select one: True Falsearrow_forward16) Composite material with plastic as a matrix material can be used as biomaterials Select one: True Falsearrow_forwardin context of centroids, a composite body refers to a body made of ________. A collection of “simple” shaped parts or holes A collection of “complex” shaped parts or holes Steel and concrete forming a structure Carbon fibers and an epoxy matrix in a car fenderarrow_forward
- Provide the relationship between each pair of variables: (direct, inverse, no effect) Fiber alignment along longitudinal direction - Strength along the transverse direction Coefficient of thermal expansion - Dimension Temperature - Thermal stress of an unconstrained beam Magnetic moments of antiferromagnets - Net magnetism 2.4 eV bandgap energy of a single crystal insulator - Opacityarrow_forwardWhich of the following is not an advantage of plastic over metal? Low thermal conductivity corrosion resistance comparatively low cost impact strengtharrow_forwardWhich of the following is correct regarding the degree of crystallinity of semi-crystalline polymers? Semi-crystalline polymers are heat treated to increase the crystallinity and improve polymer strength The tendency of a polymer to crystallize increases with increasing molecular weight Degree of crystallinity and tendency to creep have an inverse relationship Increasing the degree of crystallinity generally increases polymer strength, elastic modulus and ductility in semi-crystalline polymersarrow_forward
- Question 1 Grade 304 stainless steel is used to manufacture a component for an industrial processing plant. Which two thermoplastic materials will you recommend as an alternative material for the manufacturing of the component? Provide reasons for your recommendationarrow_forwardThermofluid Engineeringarrow_forwardMetals have ________________________ thermal conductivity value compared to polymers. High Medium Very low Lowarrow_forward
- What fiber fraction would be required for a composite with titanium fibers in a polycarbonate matrix (E = 2.5 GPa) to have the fibers handle 85% of a longitudinal tensile load? (Titanium Ef = 116 GPa )arrow_forwardWhat is the most important reason why reusable launch vehicles have typically been more expensive than expendable ones? a Reusable engines are constructed out of more costly materials b Reusable rockets require more labor to produce c Reusable vehicles have to make a two-way trip d Recovering reusable engines after launch is expensivearrow_forwardQ#04 (a) : What are composite materials? Discuss the functions of Re-inforcing agent and matrix materials. (b) : Name different types of advanced fibres.arrow_forward
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