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Matse 81 Exam -2 Questions And Answers
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Matse 81 Exam -2 Questions And Answers
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Solution 2024/2025Pepper
Matse 81 Exam #2 Questions And Answers
According to the course reading, copper is found most readily in this form. ANS✔✔ Copper carbonate
According to the course reading, the Egyptians used tin to do this. ANS✔✔ Make copper harder
A crystalline material is: ANS✔✔ when atoms are situated in a repeating array over large atomic distances.
The atoms in a face centered cubic lattice occupy the following locations ANS✔✔ the corners and the center of each
face of a cube
For the hexagonal crystal system: ANS✔✔ a = b ≠ c and two of the interaxial angles are equal to 90° with the third equal
to 120°
The hexagonal closed packed structure: ANS✔✔ has the stacking sequence of ABABAB...
An isotropic material: ANS✔✔ is a material in which properties are independent on which crystallographic direction the
measurements are taken.
A self-interstitial is a: ANS✔✔ point defect in which an extra atom is occupying space not normally occupied in the
crystal.
An alloy is a material: ANS✔✔ in which impurity atoms have been added.
An edge dislocation is a: ANS✔✔ linear defect that centers on the line that is defined along the end of the extra half-
plane of atoms.
In Metal: The Secret Life of Materials, the narrator, Mark Miodownik, thinks "There's something _______ but wonderful
about Piccadilly Circus." ANS✔✔ strange
, Solution 2024/2025
Pepper
According to the video, the dawn of civilization occurred where: ANS✔✔ Africa meets Asia.
According to Mark Miodownik, to make your fire very, very hot you need lots of: ANS✔✔ air.
In the video, an advantage of metal tools over stone, bone or wood tools was: ANS✔✔ that it can be repaired.
When you hit a metal: ANS✔✔ blockages are formed.
Bronze gets its hardness from: ANS✔✔ tin atoms replacing some copper atoms.
Cast iron was initially used to: ANS✔✔ produce iron pots.
The secret of steel's strength was discovered by: ANS✔✔ etching.
What percentage of metal produced today is steel? ANS✔✔ 90%
Wilm discovered to make aluminum stronger he needed to: ANS✔✔ age the material, which resulted in the growth of
tiny crystals.
Which of these best describes the composition of white cast iron? ANS✔✔ iron-carbon alloy with between 2.5 and 4.0
wt% carbon and less than 1.0 wt% of silicon
Which of these statements is the best description of the properties of white cast iron? ANS✔✔ extremely hard and very
brittle
Which of these statements is the best examples of applications of stainless steel? ANS✔✔ applications requiring
resistance to corrosion
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