Understanding Material Properties

Why are certain materials chosen for specific applications?

• Based on their material properties

• Based on their color

• Based on their cost

• Based on their availability

What is the purpose of a tensile test?

• To determine the maximum weight a material can hold

• To pull a material apart until it fails while measuring force and displacement

• To test the hardness of a material

• To measure the flexibility of a material

What does the stress/strain curve show?

• The weight of the material

• The color change of a material under pressure

• The point at which a material melts

• The deformation of a material under stress

What happens at the yield point during a tensile test?

• The material returns to its original shape

• The material undergoes permanent deformation

• The material completely fractures

• The material loses all its properties

What does Young's Modulus measure?

• The smell of a material

• The weight of a material

• The stiffness of a material

• The color of a material

What is the significance of the area under the stress/strain curve?

• It indicates the color of the material

• It shows the ultimate tensile strength of the material

• It represents the energy absorbed by the material before breaking

• It measures the transparency of the material

What is the difference between ductile and brittle materials?

• Brittle materials are always transparent, while ductile materials are opaque.

• Ductile materials can be stretched into wires, while brittle materials break easily.

• Brittle materials can be stretched into wires, while ductile materials break easily.

• Ductile materials are always metals, while brittle materials are plastics.

How does temperature affect the ductility of materials?

• It makes materials transparent

• It increases the weight of materials

• It can turn ductile materials into brittle at lower temperatures

• It has no effect

What property is directly related to both stiffness and yield strength?

• Taste

• Smell

• Hardness

• Color

What is the purpose of the Rockwell hardness test?

• To test the electrical conductivity of a material

• To find the melting point of a material

• To determine the material's ability to resist deformation under load

• To measure the flexibility of a material