Print Options

Card layout: ?

← Back to notecard set|Easy Notecards home page

Instructions for Side by Side Printing
  1. Print the notecards
  2. Fold each page in half along the solid vertical line
  3. Cut out the notecards by cutting along each horizontal dotted line
  4. Optional: Glue, tape or staple the ends of each notecard together
  1. Verify Front of pages is selected for Viewing and print the front of the notecards
  2. Select Back of pages for Viewing and print the back of the notecards
    NOTE: Since the back of the pages are printed in reverse order (last page is printed first), keep the pages in the same order as they were after Step 1. Also, be sure to feed the pages in the same direction as you did in Step 1.
  3. Cut out the notecards by cutting along each horizontal and vertical dotted line
To print: Ctrl+PPrint as a list

62 notecards = 16 pages (4 cards per page)

Viewing:

MSE 280 Exam 2

front 1

True or false.

A flaw in the materials lowers the fatigue life.

back 1

True

front 2

True or false.

Failure by fatigue requires an applied stress greater than the yield stress/

back 2

False

front 3

True or false.

Fatigue failure occurs earlier with a higher positive (tensile) mean stress.

back 3

True

front 4

True or false.

The stress concentration is lower around a crack than around a hole.

back 4

False

front 5

True or false.

The stress concentration is higher around a large hole than a small hole.

back 5

True

front 6

True or false.

The stress concentrated more near an internal flaw than with near a surface flaw.

back 6

False

front 7

What polymer/condition would have the highest ductility?

back 7

Thermoplastic at T>Tg

front 8

What polymer/condition that would have the highest ductility?

back 8

Thermoplastic slowly loaded

front 9

True or false.

The strength of a metal increases with increased temperature

back 9

False

front 10

True or false.

A Rockwell hardness of 100 is the same as a Brinell hardness of 100

back 10

False

front 11

What is the metal with the highest stiffness?

back 11

Steel

front 12

What is the metal with the highest melting point?

back 12

Steel

front 13

What is the metal witht he highest yield strength?

back 13

Steel

front 14

What is the metal with highest ultimate tensile strength?

back 14

Steel

front 15

What is the metal with the highest ductility?

back 15

Aluminum

front 16

What happens to the creep rate at increased temperatures?

back 16

It increases exponetially

front 17

What happens to the creep rate at increased loads?

back 17

It increases

front 18

Typically as the strength of a metal increases what happens to the ductility?

back 18

Decreases

front 19

An 650 lb tensile force is applied to an 0.12 inch diameter nickel wire having a yield strength of 45,000 psi and a tensile strength of 55,000 psi. Will the wire plastically deform?

back 19

Yes

front 20

An 750 lb tensile force is applied to an 0.14 inch diameter nickel wire having a yield strength of 45,000 psi and a tensile strength of 50,000 psi. Will the wire experience necking?

back 20

No

front 21

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

back 21

The modulus of rupture and the modulus of elasticity in bending (flexural modulus)

front 22

At room temperature, if you want to increase the strain in a steel, what has to happen to the applied stress?

back 22

it mus be increased

front 23

The following graph shows tensile test results for three metal alloys. The metal with the highest yield strength is

back 23

steel

front 24

Will a thermoplastic polymer be more brittle or more ductile above the glass transition temperature (versus below the glass transition temperature)?

back 24

it will be more ductile

front 25

The metallic crystal structure with a ductile to brittle transition temperature is

back 25

BCC

front 26

true or false.

In most materials when strength is increased, ductility also increases.

back 26

false

front 27

Which material has the higher ductility

back 27

metal

front 28

The two most common impact test types are

back 28

charpy and izod

front 29

Which of the following curves is a typical tension test result for a ceramic?

back 29

curve 1

front 30

The tensile curve from the material with the lowest ductility is

back 30

curve A

front 31

What happens to the strengths of a metal when the temperature increases significantly?

back 31

decreases

front 32

How does the strain change with time for a viscoelastic material that is held at a constant applied stress?

back 32

increases

front 33

true or false.

There is a distinct change in density when a liquid transforms to an amorphous solid.

back 33

false

front 34

Match the curve in the following graph to the metal crystal structure.

back 34

1- FCC

2- BCC

front 35

The tensile test for a slowly loaded thermoplastic and a rapidly loaded thermoplastic are shown below. Match the curve with the load rate.

back 35

A- slowly loaded

B- rapidly loaded

front 36

The tensile curves for a slowly loaded thermoplastic above the glass transition temperature and a slowly loaded thermoplastic below the glass transition temperature are shown below. Match the curve with the temperature of testing

back 36

A- above the glass

B- below the glass

front 37

Match the following hardness tests with their load range.

1. Brinell

2. Rockwell

3. microhardness

back 37

1. highest

2. medium

3. smallest

front 38

Elastic deformation is permanent deformation.

back 38

false

front 39

Match the curves

back 39

no data

front 40

A Rockwell C hardness of 50 is the same as a Brinell hardness of 50.

back 40

false

front 41

A brinell hardness value of 100 BHN is the same as a Rockwell hardness value of 100 RB.

back 41

false

front 42

The boundary between plastic and elastic deformation on a tensile test is called

back 42

yield strength

front 43

Does a more ductile or a more brittle steel have a higher ductile to brittle transition temperature?

back 43

more brittle

front 44

Which material has a highest modulus?

back 44

cermaic

front 45

Which of the following curves represents the change in specific volume (1/density) of an amorphous material with temperature?

back 45

curve 2

front 46

A steel is to be used in Alaska where the temperature in winter can become extremely cold. The material will experience some impact loading. Would an fcc steel or a bcc steel be preferable? Why?

back 46

FCC

front 47

Which material has the higher ductility and yield point?

back 47

metal

front 48

The following shows two part, that are the same except for the size of the crack in the part. Which part would you expect would fail at a lower stress?

back 48

the one with the larger crack

front 49

What is "fracture toughness" a measure of?

back 49

The resistance to fracture with a pre-existing flaw

front 50

The following shows two parts that are the same except for the shape of the flaw in the part. The flaw is the same length in the two parts. Which part would you expect would fail at a lower stress?

back 50

The part with the sharper crack

front 51

The critical surface crack length for a magnesium part is 0.2 inches. The nondestructive evaluation (NDE) technique used to evaluate the part has a resolution of 0.1 inches. The technique will resolve the critical flaws for this application.

back 51

true

front 52

Would you expect a part that has been carefully machined to a smooth finish to fail before or after a similar part with a rough machined surface?

back 52

after

front 53

Circle all of the following that will give failure at a lower applied stress.

back 53

a bigger flaw vs a smaller flaw

front 54

The most common cause of failure is

back 54

fatigue

front 55

The following shows two possible options for a highly stressed corner in a part you are designing. Which would you expect to last longer?

back 55

The design with the rounded corner

front 56

Which would you expect to be more sensitive to a flaw on it's surface

back 56

cermaic

front 57

Which of the following WOULD NOT have a longer fatigue life?

back 57

An aircraft with windows with square corners

front 58

The following shows two parts that are the same except for the location of the crack in the part. The crack is the same size in the two parts. Which part would you expect would fail at a lower stress?

back 58

The part with the crack on the surface

front 59

Which of the following can cause failure at applied stresses below the yield stress?

back 59

Stress corrosion cracking, a defect in a part, creep, and fatigue

front 60

Which of the following is NOT a good description of a ductile failure.

back 60

it requires little energy

front 61

At room temperature, if stress applied to a steel is constant, will the strain change over time?

back 61

no

front 62

Which of the following is true for stress corrosion cracking.

back 62

Associated with a corrosive environment.