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Free Practice Quiz Question List

04 Metals and Alloys Online Quiz Questions

Use this free practice quiz with 20 questions to review 04 Metals and Alloys, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

Steel is based on iron alloyed with carbon, and stainless steels add chromium to improve corrosion resistance. True or false?

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which crystal structure does magnesium have at room temperature?

  1. A

    Body-centered cubic (BCC)

  2. B

    Face-centered cubic (FCC)

  3. C

    Hexagonal close-packed (HCP)

  4. D

    Amorphous

03
Choose one
1 point

A steel part becomes stronger and harder after cold rolling, while its ductility usually decreases. Which strengthening method best describes this change?

  1. A

    Solution treatment and aging

  2. B

    Work (strain) hardening

  3. C

    Normalizing

  4. D

    Annealing

04
True or false
1 point

Annealing commonly softens metal and can improve its ductility or formability. True or false?

  1. A

    True

  2. B

    False

05
Written response
1 point

What are the crystal defects whose movement through a metal is mainly responsible for plastic deformation?

06
Choose all
1 point

Select all the methods described as strengthening metals by making deformation more difficult, including methods that impede dislocation motion or form a hard phase.

  1. A

    Work (strain) hardening

  2. B

    Solid-solution strengthening

  3. C

    Annealing

  4. D

    Grain refinement

  5. E

    Precipitation or particle strengthening

  6. F

    Slow cooling by itself

  7. G

    Transformation strengthening

07
Choose one
1 point

Which description best identifies normalizing steel?

  1. A

    Heating followed by slow furnace cooling to maximize softness

  2. B

    Rapid cooling to form martensite, followed by reheating to reduce brittleness

  3. C

    Heating followed by air cooling to produce a generally finer structure than full annealing

  4. D

    Heating to dissolve alloying elements, then aging to form precipitates

08
Written response
1 point

After steel is quenched, what is the name of the lower-temperature reheating step used to reduce brittleness and improve toughness while retaining useful strength?

09
Choose all
1 point

Select all applications specifically associated with copper and copper alloys because of their high electrical and thermal conductivity.

  1. A

    Electrical conductors and connectors

  2. B

    Structural frames where steel is selected for balanced strength and cost

  3. C

    Transportation components selected for aluminum's low mass

  4. D

    Heat-transfer equipment

  5. E

    Biomedical components selected for titanium's properties

10
True or false
1 point

An alloying change that increases a metal's strength may reduce its electrical conductivity. True or false?

  1. A

    True

  2. B

    False

11
Choose one
1 point

An engineer is deciding whether to quench a steel component. Which consideration is most consistent with choosing an appropriate treatment?

  1. A

    Quenching is always best if maximum hardness is desired

  2. B

    The part's surface finish is the only important consideration

  3. C

    Section size, distortion, cracking risk, and the alloy's hardenability matter

  4. D

    Quenching produces the same microstructure in every alloy

12
Open ended
1 point

A component requires a suitable aluminum alloy to gain strength through fine precipitates after processing. Which heat-treatment sequence should be considered, and how does it strengthen the alloy?

13
Choose one
1 point

A metal part needs to be softened and made easier to form before a shaping operation. Which heat treatment is commonly used for this purpose?

  1. A

    Quenching

  2. B

    Annealing

  3. C

    Normalizing

  4. D

    Precipitation aging

14
Choose one
1 point

A designer needs a material for both an electrical connector and a heat-transfer component. Which material family is a strong candidate based on its combination of electrical and thermal conductivity?

  1. A

    Titanium alloys

  2. B

    Carbon steels

  3. C

    Copper and copper alloys

  4. D

    Stainless steels

15
Written response
1 point

In an alloy, additional atoms fit into spaces between the host atoms rather than replacing them. What type of solid solution is formed?

16
Choose one
1 point

A metal is processed to have finer grains. Which explanation best describes why this change generally increases its strength?

  1. A

    The additional grain boundaries obstruct dislocation motion.

  2. B

    The grain boundaries make the metal’s atoms stop forming a crystal.

  3. C

    The finer grains remove all dislocations from the metal.

  4. D

    The grain boundaries increase strength by preventing any plastic deformation.

17
Written response
1 point

After steel is quenched to form hard martensite, it is reheated to a lower temperature to reduce brittleness and improve toughness. What is this reheating step called?

18
Choose one
1 point

An aluminum alloy is strengthened using solution treatment followed by aging. Which sequence best explains how this treatment produces strengthening?

  1. A

    Rapid cooling immediately forms martensite, and aging removes it.

  2. B

    Slow cooling creates coarse grains that increase strength.

  3. C

    Cold working raises dislocation density, and aging removes the dislocations.

  4. D

    Heating dissolves alloying elements, cooling retains a supersaturated solution, and aging forms fine precipitates.

19
Fill in the blank
1 point

Two samples of the same alloy have different phase structures after different manufacturing histories. This is possible because the phases present depend on composition, temperature, and .

20
Fill in the blank
1 point

When comparing crystalline metals, knowing their crystal structures helps explain deformation, but predicting ductility also requires considering the arrangement and availability of .