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MATSE exam #3
Terms in this set (84)
According to the course reading, where did human begin adding straw to clay to form mud brick around 1500 BCE?
What types of structural materials are aircraft engineers searching for?
low density and stiff
What are the sub-classifications of structural composite types discussed in this chapter?
laminates, sandwich panels
What best describes concrete?
the matrix is cement and the particulates are sand and gravel
What is necessary for the complete bonding of cement and the aggregate particles in concrete?
correct quantity of water
In addition to the properties of the material composing the fiber in a fiber-reinforced composite, what is the most important factor for producing a significant improvement in strength?
length of the fiber
On the basis of diameter and character, fibers are grouped into what different classifications?
whiskers, fibers, wires
In general, what is the role of the reinforcing component in a ceramic-matrix composite?
improve fracture toughness
This composite is designed to be lightweight beams or panels:
Which of these nanocomposite materials classifications is used in the niche application of anodes for lithium-ion rechargeable batteries?
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, without ready access to this, genius and work would never reach such noble heights.
a dull grey powder
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, how long did it take the Romans to develop their knowledge of concrete?
more than 300 years
How long ago where the great Roman concrete structures built?
nearly 2,000 years ago
What inspired the development of Portland Cement?
What is 'Portland Cement' named after?
a local landmark near its development
What was first added to concrete to make reinforced concrete?
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, who uses scientific mixes of selected raw materials to produce very dense concrete?
nuclear power plants
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, how many movies has the Empire State Building has been used in?
more than 90
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, how many vehicles drive through concrete tunnels to cross the Alps?
According to the video Monuments to Man: The Impact and Influence of Concrete on Civilization, how many workers died during the construction of the Panama Canal?
Which of these are classified by the textbook as metal forming operations?
forging, rolling, extruding, drawing
what is forging?
mechanically working or deforming a single piece of usually hot metal
What is investment casting?
pattern is made from a wax or plastic
what is sand casting?
ordinary sand is used as the mold material
These are formed at elevated temperatures from a fluid mass.
Which of the following glass forming process has a version that involves floating the glass on molten metal?
What is the heat treatment which enhances the strength of glass by intentionally inducing compressive residual surface stresses?
What is the process where gradual formation of a liquid glass flows into and fills some pore volume called?
What is the material called which is added to polymers to improve the resistance to combustion of the material?
What is the process called in which molten thermoplastic material is poured into a mold and allowed to solidify?
According to the video Raw to Ready: Bombardier, what do the armor of samurai warriors inspire?
According to the video Raw to Ready: Bombardier, what is in the sand all around us?
According to the video Raw to Ready: Bombardier, how does scientist Charles Martin Hall extract more aluminum?
by using a battery
According to the video Raw to Ready: Bombardier, how did metallurgist Alfred Wilm strengthen aluminum for the first time?
he went sailing, which allowed the aluminum to cure
According to the video Raw to Ready: Bombardier, what was added to aluminum to prevent cracking?
According to the video Raw to Ready: Bombardier, what is required to be truly strong glass?
According to the video Raw to Ready: Bombardier, who discovered titanium?
an English pastor
According to the video Raw to Ready: Bombardier, how much of the titanium used is used by the aviation industry?
According to the video Raw to Ready: Bombardier, what did the Mongolian horsemen use to build their empire?
According to the video Raw to Ready: Bombardier, synthetic lacquered leather is?
easier to clean than fabric
Materials designed specifically for use in biological applications, such as artificial limbs and membranes for dialysis, as well as aiding in the repair of bones and muscle
the branch of engineering science in which biological science is used to study the relation between workers and their environments
materials designed to bear load and provide support
Materials that interact or replace biological systems with a primary function other than providing support.
ability of a biomaterial to function within a host
What law indicates that bone will adapt to repeated environmental stresses, becoming stronger when exposed to high stress levels and becoming weaker when stress is reduced?
In 1909, what physician developed the first prosthetic arm capable of prehension?
The Palmaz stent was made of what material that was used for many years and is still used in some stents?
Why do amalgams remain in use?
because of their blend of hardness, ease of manufacturing and low cost
The main problem with artificial hearts is what?
Many biomaterials are used to enhance the performance of functional, natural organs rather than what?
replace the natural organs
Heart valves that are removed from a cadaver and frozen in liquid nitrogen are called what?
An artificial pacemaker is a small device implanted directly into what organ?
The ethical issues of biomaterials are so complex that this field has been created.
In the shark segment of Making Stuff: Smarter, David Progue is exploring:
how shark skin is being studied to use structure rather than chemistry to inhibit the growth of bacteria.
Featured on the show Making Stuff: Smarter was:
a robot who utilized directional adhesion.
In Making Stuff: Smarter, Geckos are featured because they:
have millions of microscopic hairs on their feet.
Featured on the show Making Stuff: Smarter:
were self-healing materials
According to the show Making Stuff: Smarter, some non-Newtonian fluids:
change thickness depending on how hard you hit them.
According to the show Making Stuff: Smarter, magneto-rheological fluid:
responses to magnetic fields and is being researched to dampen vibrations.
Stents, tools used by surgeons to open up arteries, are being used today to save lives.
According to Making Stuff: Smarter, memory alloy:
remember its original shape
A material with a lot of winding paths:
is classified as a material with high tortuosity.
In the show Making Stuff: Smarter, a jar of pickles is used to demonstrate a partially working invisibility cloak for microwaves.
What is the term for the intrinsic property that quantifies how strongly a given material opposes the flow of electric current?
Which of these have very low electrical conductivities?
What is the band that is completely filled with electrons?
What is a semiconductor whose electrical properties are dictated by the impurity atoms in the semiconductor?
According to Thrower, what is a consequence of Moore's Law?
increasingly fast and powerful, but quickly obsolescence, personal computers
According to Thrower, what can produce smaller than 50 nm devices that can overcome the tunneling/leakage problems associated with conventional microelectronics?
What is an electronic device that is constructed from a single piece of semiconductor that is doped with electron donors on one side and electron acceptors on the other?
p-n rectifying junction
These are used to store information even when no power is applied.
Who, in 1959, delivered a now famous lecture on the virtues of going small?
According to Thrower, what is a consequence of having nanocrystals having a higher surface to volume ratio?
In the video Making Stuff: Smaller, what does David Pogue find when he cuts open a digital camera?
a solid slab of silicon, sprinkled with other elements like boron and arsenic, topped with layers of metals and ceramics
According to the video Making Stuff: Smaller, how many additions in a second could a computer do fifty years ago?
a few thousand
According to the video Making Stuff: Smaller, what made the pocket watch possible?
According to the video Making Stuff: Smaller, what of the following is true about quartz?
it is made of silicon, which is a semiconductor
According to the video Making Stuff: Smaller, what are semiconductors useful for?
switching the flow of electricity on and off
In the video Making Stuff: Smaller, what does Dr. Frances Ross proposes that nanowires have that allows them to avoid short circuits?
increased surface area
According to the video Making Stuff: Smaller, how thick is graphene?
In the video Making Stuff: Smaller, what movie do they cite as a possible prophecy for the future?
In the video Making Stuff: Smaller, what does Dr. Chad Mirkin use in his technology to test for genetic variations?
silver and gold
According to the video Making Stuff: Smaller, what is melittin?
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