FE: Fundamental Principles

Which statement correctly describes polymers?

A. They generally have high density
B. They are generally organic compounds
C. They remain stable at very high temperatures
D. They are combinations of materials that differ in form or composition

B. They are generally organic compounds

Which description best defines metal fatigue?

A. Failure caused by repeated or cyclic loading
B. Immediate deformation under one static load
C. Chemical deterioration caused only by saltwater
D. Slow deformation caused by sustained heat

A. Failure caused by repeated or cyclic loading

Which activity does not increase the fatigue endurance limit of a metal?

A. An appropriate surface treatment
B. Introducing favorable compressive residual stress
C. Improving surface condition
D. Creating stress concentrations at the surface

D. Creating stress concentrations at the surface

How many atoms are effectively contained in one body-centered cubic unit cell?

A. 1
B. 4
C. 2
D. 8

C. 2

Which statement concerning covalent or metallic bonding is false?

A. Covalent bonds involve shared electrons
B. Metallic bonding permits electrons to move through the material
C. Metallic bonding generally supports electrical conductivity
D. Covalent bonding is defined by freely mobile electrons shared throughout a metal lattice

D. Covalent bonding is defined by freely mobile electrons shared throughout a metal lattice

Which thermoelectric phenomenon produces a voltage because two junctions of dissimilar materials are at different temperatures?

A. Hall effect
B. Seebeck effect
C. Photoelectric effect
D. Piezoelectric effect

B. Seebeck effect

The degree of polymerization represents:

A. The number of repeating units in a polymer chain
B. The number of phases in a metal alloy
C. The number of atoms in a crystal unit cell
D. The ratio of stress to strain

A. The number of repeating units in a polymer chain