
Understanding Steel and Its Microstructures
Authored by Anne Shen
Mathematics
12th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are steels primarily composed of?
Iron and nickel
Iron and carbon
Iron and aluminum
Iron and copper
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical carbon content range for low carbon steels?
1.7-2.5 weight percentage
0.7-1.7 weight percentage
0.3-0.7 weight percentage
0.04-0.3 weight percentage
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which phase of iron is soft and magnetic?
Alpha ferrite
Austenite
Cementite
Delta-iron
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At what temperature range does austenite (gamma phase iron) exist?
910-1391 °C
727-910 °C
1391-1538 °C
Below 727 °C
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the chemical composition of cementite?
Fe3C
Fe2C
Fe4C
FeC
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the eutectoid composition of carbon in steel?
0.76 weight percentage
0.43 weight percentage
1.7 weight percentage
4.3 weight percentage
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main characteristic of high carbon steels?
High ductility
Low strength
High hardness and abrasion resistance
High corrosion resistance
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