ENGINEERING MATERIALS 251-300

The greatest stress which a material is capable of withstanding without deviation from acceptable stress to strain is called

• a. elongation

• b. proportional limit

• c. yield point

• d. elastic limit

What refers to the stress at which a material exhibits a specified deviation from proportionality of stress and strain?

• a. Tensile strength

• b. Shear strength

• c. Yield strength

• d. Flexural strength

What is the amount of energy required to fracture a given volume of material?

• a. Impact strength

• b. Endurance limit

• c. Creep strength

• d. Stress rupture strength

What mechanical property of a material which is a time-dependent permanent strain under stress?

• a. elongation

• b. elasticity

• c. creep

• d. rupture

In tensile testing, the increase in the gage length measured after the specimen fractures within the gage length is called

• a. Percent elongation

• b. Creep

• c. Elasticity

• d. Rupture

What is the resistance of a material to plastic deformation?

• a. Hardness

• b. Creepage

• c. Stiffness

• d. Rigidity

What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles?

• a. Endurance state

• b. Endurance test

• c. Endurance limit

• d. Endurance strength

What is a substance that attracts piece of iron?

• a. Conductor

• b. Semiconductor

• c. Magnet

• d. All of the choices

Which of the following is a natural magnet?

• a. Steel

• b. Magnesia

• c. Lodestone

• d. Soft iron

Which of the following material has permeability, slightly less than that of free space?

• a. Paramagnetic materials

• b. Non-magnetic materials

• c. Ferromagnetic materials

• d. Diamagnetic materials