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Matse 81 Exam 2 with complete solutions 2024_2025.
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Matse 81 Exam 2 with complete solutions 2024_2025.
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Matse 81 Exam 2 with complete solutions2024/2025
According to the course reading, copper is found most readily in this
form. - ANSWER✓✓-Copper carbonate
According to the course reading, in the Egyptian copper smelting
process iron was used to do - ANSWER✓✓-Bind and float away
impurities
A unit cell is: - ANSWER✓✓-the small group of atoms that when
repeated form the complete material.
The atoms in a hexagonal close packed lattice occupy the following
locations: - ANSWER✓✓-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: - ANSWER✓✓-a ≠ b ≠ c and all
the interaxial angles are equal to 90°
The hexagonal closed packed structure: - ANSWER✓✓-has the
stacking sequence of ABABAB...
A grain: - ANSWER✓✓-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: - ANSWER✓✓-point defect in which an extra
atom is occupying space not normally occupied in the crystal.
, An alloy is a material: - ANSWER✓✓-in which impurity atoms have
been added.
A screw dislocation is a: - ANSWER✓✓-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: - ANSWER✓✓-the most exciting
story of science.
According to the video, the dawn of civilization occurred where: -
ANSWER✓✓-Africa meets Asia.
According to Mark Miodownik, remnants from early smelting has
been found: - ANSWER✓✓-on a hillside.
In the video, an advantage of metal tools over stone, bone or wood
tools was: - ANSWER✓✓-that it can be repaired.
When you hit a metal, the metal: - ANSWER✓✓-gets stronger.
Iron replacing bronze was delayed because: - ANSWER✓✓-iron is
difficult to work with.
Iron: - ANSWER✓✓-can be purified by pounding out impurities.
The secret of steel's strength was discovered by: - ANSWER✓✓-
etching.
Aluminium is:
For the production of jet engine parts, creep is prevented by: -
ANSWER✓✓-three times lighter than steel.
For the production of jet engine parts, creep is prevented by: -
ANSWER✓✓-growing each part from one crystal.
Which of these best describes the composition of compacted
graphite iron? - ANSWER✓✓-iron-carbon alloy with normally between
3.1 and 4.0 wt% carbon and between 1.7 and 3.0 wt% of silicon
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