Matse 81 Exam 2 UPDATED Exam Questions and CORRECT Answers
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Course
Matse 81
Institution
Matse 81
Matse 81 Exam 2 UPDATED Exam
Questions and CORRECT Answers
According to the course reading, copper is found most readily in this form. - Correct AnswerCopper carbonate
According to the course reading, in the Egyptian copper smelting process iron was used to do
- Correct Answer- Bind and floa...
Matse 81 Exam 2 UPDATED Exam
Questions and CORRECT Answers
According to the course reading, copper is found most readily in this form. - Correct Answer-
Copper carbonate
According to the course reading, in the Egyptian copper smelting process iron was used to do
- Correct Answer- Bind and float away impurities
A unit cell is: - Correct 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: - Correct
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: - Correct Answer- a ≠ b ≠ c and all the interaxial angles
are equal to 90°
The hexagonal closed packed structure: - Correct Answer- has the stacking sequence of
ABABAB...
A grain: - Correct 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: - Correct Answer- point defect in which an extra atom is occupying
space not normally occupied in the crystal.
An alloy is a material: - Correct Answer- in which impurity atoms have been added.
A screw dislocation is a: - Correct 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: - Correct Answer- the most exciting story of science.
According to the video, the dawn of civilization occurred where: - Correct Answer- Africa
meets Asia.
According to Mark Miodownik, remnants from early smelting has been found: - Correct
Answer- on a hillside.
In the video, an advantage of metal tools over stone, bone or wood tools was: - Correct
Answer- that it can be repaired.
When you hit a metal, the metal: - Correct Answer- gets stronger.
Iron replacing bronze was delayed because: - Correct Answer- iron is difficult to work with.
Iron: - Correct Answer- can be purified by pounding out impurities.
The secret of steel's strength was discovered by: - Correct Answer- etching.
Aluminium is:
For the production of jet engine parts, creep is prevented by: - Correct Answer- three times
lighter than steel.
For the production of jet engine parts, creep is prevented by: - Correct Answer- growing each
part from one crystal.
Which of these best describes the composition of compacted graphite iron? - Correct Answer-
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? -
Correct Answer- extremely hard and very brittle
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