Engineering Materials Quiz

What is the unit use for Force?

• Newton (N)

• Pascal (Pa)

• Kilogram per cubic meter (kg/m³)

• Meter (m)

Why is the measure of density important for engineers?

• To calculate the speed of an object

• To estimate the weight of a product and identify unknown materials

• To determine the electrical conductivity of a material

• To measure the temperature resistance of a material

What does yield strength signify in a material?

• The point at which a material will melt

• The level at which a material begins to permanently deform

• The maximum stress a material can withstand without breaking

• The point at which a material becomes completely rigid

Why do engineers need to know the yield strength of a material?

• To determine the colorfastness of the material

• To calculate the thermal expansion of the material

• To understand when a material will change shape permanently

• To measure the acoustic properties of the material

Why is Young's modulus important in engineering?

• It helps in determining the flavor of a material

• It is used to calculate the magnetic properties of a material

• It describes the tendency of an object to deform along an axis when opposing forces are applied

• It measures the radioactivity of a material

What does ductility refer to in materials?

• The ability to tolerate high temperatures without melting

• The ability to tolerate stretching without breaking

• The ability to resist changes in volume when pressure is applied

• The ability to return to original shape after being compressed

Why is hardness (H_V) important in material design?

• It determines how easily heat can flow in a material

• It defines how well a material resists deformation, indentation, and penetration on its surface

• It measures the material's ability to resist conducting an electric current

• It represents the temperature at which a material melts

What does electrical conductivity (S/m) measure in a material?

• The material's resistance to conducting an electric current

• The material's ability to resist impact energy without breaking

• How well a material conducts electricity, for example by using electrons in metals

• The temperature at which a material changes from solid to liquid

Why might a high value of electrical resistivity be favored in certain materials?

• To improve the material's ability to tolerate impact energy

• To enhance the material's fracture toughness

• To provide electrical insulation and design heating elements

• To define the material's melting point

Elasticity in a material is: ....

• is the ability of a material to absorb a force and break.

• is the ability of a material to absorb a force and flex in different directions, and then return

  to its original shape.

• is the ability of a material to absorb a force and stay deformed.

• is the ability of a material to rust.