Engineering Materials - Understanding Metals

Which of the following is not a category of engineering materials?

• Polymers

• Metals

• Ceramics

• Composites

What is the most important metal used in engineering?

• Titanium

• Copper

• Aluminum

• Iron

Which metal is commonly used for its high strength-to-weight ratio?

• Nickel

• Copper

• Aluminum

• Iron

Which metal is known for its excellent strength-to-weight properties and is popular in aerospace applications?

• Titanium

• Copper

• Nickel

• Magnesium

What is the regular structure of metals called?

• Composite

• Polymeric

• Crystalline

• Amorphous

Which crystal structure is most common in metals?

• Face-centered cubic (FCC)

• Body-centered cubic (BCC)

• Hexagonal close-packed (HCP)

• Amorphous

What type of defect occurs when an atom is missing from the lattice?

• Vacancy defect

• Interstitial defect

• Substitutional defect

• Dislocation

What type of defect occurs when an atom squeezes into the gap between existing atoms in the lattice?

• Dislocation

• Vacancy defect

• Substitutional defect

• Interstitial defect

What type of defect occurs when certain atoms in the lattice are completely replaced by impurity atoms?

• Vacancy defect

• Substitutional defect

• Dislocation

• Interstitial defect

What is the motion of a large number of dislocations at the atomic level called?

• Work hardening

• Precipitation hardening

• Elastic deformation

• Plastic deformation