1. Restricting dislocation motion will strengthen materials; which of the

following IS NOT a method for restricting dislocation motion:

a)Solid solution hardening

b)Grain size reduction

c)Sublimation hardening

d)Strain hardening (work hardening)

e)Precipitation hardening

2. In which of the following stages of creep is the creep rate linear?

a)Modulus stage

b)Proportionality stage

c)Primary

d)Secondary

e)Tertiary

3. The Charpy toughness test measures what?

a)Strain under specified load

b)Stress under specified load

c)Temperature change in specimen

d)Dislocation propogation

e)Energy absorbed at fracture