Materials Science QCAA Engineering Unit 4

What is the term for the measure of a material's resistance to deformation?

• Stiffness

• Toughness

• Elastic limit

• Proportional limit

Solid materials have been grouped into how many basic classifications within the unit 4 context?

• Two

• Three

• Four

• Five

The classification of solid materials is primarily based on what?

• Color and texture

• Chemical makeup and atomic structure

• Weight and density

• Cost and availability

Which of the following properties is NOT directly attributable to free roaming electrons in metals?

• Conductivity

• Transparency

• Luster

• Malleability

Compared to metals and polymers, ceramics are more resistant to what?

• High temperatures and harsh environments

• Low temperatures and mild environments

• High pressures and soft environments

• Low pressures and gentle environments

Which of the following is a characteristic of ceramics?

• Hard and brittle

• Soft and flexible

• Elastic and resilient

• Malleable and ductile

What characteristic is associated with a strong material that is not ductile?

• It stretches very little and breaks suddenly

• It has a large plastic region

• It undergoes significant necking

• It has a very small elastic region

What is the characteristic of a material that is very ductile but weak?

• It has a large plastic deformation

• It is very strong and not ductile

• It undergoes significant necking

• It fractures suddenly under high stress

What is the term used for the stress value at the elastic limit?

• Proportional stress

• Ultimate stress

• Yield stress

• Breaking stress

What is the term for the maximum stress a material can withstand before failure?

• Ultimate stress

• Yield stress

• Proportional limit

• Elastic limit