Deck 6: Properties and Tests of Selected Plastics

Question 1

Chemical resistance tests of selected plastics shows that ____ is only slightly affected by strong acids.

A) polyamide
B) acetal
C) melamine
D) acrylic

Answer 1

C

Question 2

In comparing relative densities of plastics, which plastic is denser?

A) ABS
B) urethanes
C) fluoroplastics
D) polyester

Answer 2

C

Question 3

The rate at which heat energy is transferred from one molecule to another is called ____.

A) deflection temperature
B) thermal expansion
C) specific heat
D) thermal conductivity

Answer 3

D

Question 4

The unit of work or energy is a ____. 

A) joule
B) watt
C) hertz
D) newton

Question 5

What is the ability of a material to withstand forces pulling it apart called?  

A) tensile strength
B) modulus of elasticity
C) toughness
D) modulus of rupture

Question 6

Mechanical forces that can affect materials are measured by the formula, Force = Mass x ____.

A) height
B) weight
C) acceleration
D) pressure

Question 7

When a mass suspended from a test sample causes the sample to change shape over a period of time, the strain is called ____.

A) fatigue
B) stress
C) tension
D) creep

Question 8

What is the ability to absorb or dissipate vibrations called?

A) damping
B) hardness
C) fatigue
D) None of the above

Question 9

Stress usually causes material to deform in length, a change known as ____.

A) a gravity constant
B) deformation
C) strain
D) strength

Question 10

The SI metric system consists of seven base units, with ____ designating the base unit for mass.   

A) candela
B) kilogram
C) meter
D) mole

Question 11

The ratio between the stress applied and the strain within the linear range of the stress-strain curve is called the ____.  

A) modulus of rupture
B) tensile strength
C) toughness
D) modulus of elasticity

Question 12

Pressure (stress) is force applied over an area. The metric unit for stress is referred to as the ____.

A) joule
B) pascal
C) newton
D) hertz

Question 13

The measure of how much stress (load) can be applied to a material before it breaks is ____.  

A) tensile strength
B) flexural strength
C) compressive strength
D) shear strength

Question 14

A millimeter is ____ meter.

A) one thousandth of a
B) one hundredth of a
C) a hundred times a
D) a thousand times a

Question 15

When calculating compressive strength, the units used are multiples of the ____.

A) hertz
B) meter
C) joule
D) pascal

Question 16

Which material has the highest thermal conductivity?

A) aluminum
B) glass
C) iron
D) copper

Question 17

The value that shows how much force is needed to rupture or crush a material is known as ____.

A) toughness
B) tensile strength
C) compressive strength
D) modulus of elasticity

Question 18

Which material has the highest viscosity?

A) molasses
B) water
C) kerosene
D) corn syrup

Question 19

Which plastics material has the highest thermal expansion value?

A) phenol-formaldehyde
B) silicones
C) polyethylene
D) epoxy

Question 20

The measure of the ability of a material to support combustion is called ____.

A) self-extinguishment
B) flammability
C) melt index
D) ablative index

Question 21

Which plastics material is most hygroscopic?

A) epoxy
B) polyethylene
C) polyamide
D) polycarbonate

Question 22

Strain is measured in millimeters per ____.

A) centimeter
B) millimeter
C) kilogram
D) gram

Question 23

Young's modulus is measured by the ratio of stress to____.

A) strain
B) mass
C) strength
D) acceleration

Question 24

The intensity of a color is represented by its ____. 

A) saturation
B) hue
C) refraction
D) lumina

Question 25

Many weathering tests are conducted in ____, where samples receive considerable exposure to heat, moisture, and sunlight.

A) Texas
B) California
C) Arizona
D) Florida