WorksheetsAlloys Unit Test Review
Total questions: 14
Worksheet time: 7mins
All alloys are mixtures.
True
False
Mixtures that do NOT behave as a pure substance have a melting range, not a melting point.
True
False
During a phase change the temperature:
stays the same
decreases
increases
increases then decreases
When thinking of a binary phase diagram for an alloy, this mixture has a melting range rather than a melting point. It is not quite a solid and not quite a liquid.
eutectic
oxidation
slush
amorphous
On a binary phase diagram for an alloy, all substances are in the liquid phase above this line
solidus
homogeneous
liquidus
Curie
On a binary phase diagram, the solidus and liquidus lines touch in how many places?
1
2
3
4
Brass is an example of a/an ________________ alloy because zinc atoms replace copper atoms.
substitutional
interstitial
eutetic
vacancy
Nitinol is an extraordinary alloy because it
does not melt.
cannot be bent.
can return to a parent shape
All choices
To give Nitinol its parent shape, it must
create a crystal shape known as austentite.
undergo a solid state phase change.
be heated to 550° C.
All of the above
What is occuring at region D on the heating curve pictured?
temperature increase
temperature decrease
phase change
loss of energy
Nitinol is alloy of what two elements?
nickel & titanium
nitrogen & tin
nitrogen & titanium
nickel & tin
The element that is present in the alloy in smaller quantities is known as the
alloying agent.
daughter element.
daughter metal.
None of the choices
The lowest melting temperature for an alloy is
equal to the lowest melting point of the components.
equal to the average melting point of the components.
dependent on the eutetic point for the alloy.
the same for all alloys.
What was the first practical alloy made by humans?
brass
bronze
steel
sterling silver
