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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, in the Egyptian copper smelting process iron was used to do ANS✔✔ Bind and float
away impurities
A unit cell is: ANS✔✔ the small group of atoms that when repeated form the complete material.
The atoms in a hexagonal close packed lattice occupy the following locations: ANS✔✔ the corner of each hexagon, in the
center of each hexagon and a triangle of three in between the hexagons
For the orthorhombic crystal system: ANS✔✔ a ≠ b ≠ c and all the interaxial angles are equal to 90°
The hexagonal closed packed structure: ANS✔✔ has the stacking sequence of ABABAB...
A grain: ANS✔✔ is a region of a material where the periodic and repeated arrangement of atoms extends throughout
the entirety of the region but not the whole specimen
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.
A screw dislocation is a: ANS✔✔ twisting defect caused by the application of a shear force.
In Metal: The Secret Life of Materials, for the narrator, Mark Miodownik, the story of materials is: ANS✔✔ the most
exciting story of science.
, Solution 2024/2025
Pepper
According to the video, the dawn of civilization occurred where: ANS✔✔ Africa meets Asia.
According to Mark Miodownik, remnants from early smelting has been found: ANS✔✔ on a hillside.
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, the metal: ANS✔✔ gets stronger.
Iron replacing bronze was delayed because: ANS✔✔ iron is difficult to work with.
Iron: ANS✔✔ can be purified by pounding out impurities.
The secret of steel's strength was discovered by: ANS✔✔ etching.
Aluminium is:
For the production of jet engine parts, creep is prevented by: ANS✔✔ three times lighter than steel.
For the production of jet engine parts, creep is prevented by: ANS✔✔ growing each part from one crystal.
Which of these best describes the composition of compacted graphite iron? ANS✔✔ iron-carbon alloy with normally
between 3.1 and 4.0 wt% carbon and between 1.7 and 3.0 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 compacted graphite iron? ANS✔✔ diesel engine
blocks, exhaust manifolds, gearbox housings, brake discs for high-speed trains, and flywheels
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