test 2

Question 1

The relative tendency to corrode is the same for metals in all chemical environments.

Answer 1

False

Question 2

Water vapor can increase the degradation rate of ceramics

Answer 2

True

Question 3

A more active metal is more likely to corrode than a more noble metal.

Answer 3

True

Question 4

The best environment to use stainless steels is in a chlorine rich environment

Answer 4

False

Question 5

The rate of oxidation increases exponentially with increased temperature.

Answer 5

true

Question 6

At the end of the tensile test of a thermoplastic (above the glass transition temperature, slowly loaded) the stress increases because

Answer 6

the chains become aligned and additional secondary bonding kicks in

Question 7

The two most common impact test types are

Answer 7

Charpy

Izod

Question 8

The initial slope of a tensile test curve will be higher in a material with a higher melting point.

Answer 8

false

Question 9

How does elastic deformation occur in a metal?

Answer 9

bond streching

Question 10

Which is considered more ductile - a material with a high ductile to brittle transition temperature or a material with a low ductile to brittle transition temperature?

Answer 10

A material with a low ductile to brittle transition temperature.

Question 11

Possible mechanical properties obtained from a bend test include (more than one answer is possible)

Answer 11

modulus of rupture

modulus of elasticity in bending