Quiz 1: Introduction to Mechanical Properties of Materials

The phenomenon of material failure after cyclic loading at a stress level below the yield stress of a material is known as:

Fatigue

9. All of the following are properties of a material EXCEPT: a. Yield point b. Modulus of elasticity c. Poisson's ratio d. Flexural rigidity e. Endurance limit

Flexural rigidity

10. Brittle facture is a fracture of a material with: a. High ductility and low energy b. Significant deformation required c. Little or no plastic deformation and low energy d. Very high conductivity e. High toughness

Little or no plastic deformation and low energy

Which of the following are examples of chemical properties?

Oxidation resistance and corrosion resistance

8. Which of the following is NOT an example of a physical property? a. Tensile strength b. Melting point c. Coefficient of thermal expansion d. Thermal conductivity

Tensile strength

Which of the following statements about numerical values of the engineering properties of materials is usually valid?

They are dependent on the testing method and the prior processing of the material

Which of the following are mechanical properties?

Ultimate tensile strength, yield strength, and hardness

The lowest stress at which a specified amount of measurable permanent deformation occurs is called:

Yield strength

Creep, fatigue or stress-corrosion failures occur

at stresses well below the yield strength

Stiffness of metals generally

increases as melting temperature increases