
Materials Science Quiz
Engineering
11th Grade
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17 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What do cooling curves help identify in phase diagrams?
The melting point of pure metals
Liquidus and solidus lines
The density of alloys
The electrical resistance of materials
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the main difference between phases and components in alloys?
Phases are physical states, while components are chemical elements
Phases are chemical elements, while components are physical states
Phases are always solid, while components are always liquid
Phases are mixtures, while components are pure substances
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What does the X-axis represent in a phase diagram for alloys?
Temperature
Pressure
Composition (e.g., % copper, % nickel)
Time
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What does equilibrium refer to in material science?
A material that is uniform throughout.
A region with uniform properties and structure.
A stable state where the phases and their proportions do not change over time.
A material with visibly different parts or phases.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is one of the main reasons alloys are created?
To reduce weight
To improve strength
To increase cost
To decrease conductivity
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the state of an alloy below the solidus line?
Fully solid
Partially solid
Fully liquid
Partially liquid
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What happens to a copper-nickel mixture when it solidifies?
It forms multiple phases.
It forms a single, homogeneous phase.
It separates into copper and nickel layers.
It becomes a gas.
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