Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
On the stress-strain diagram, which axis would have unitless numbers (e.g.,
mm/mm or in/in or -/-)?
a. | Stress | c. | Both axes | b. | Strain | d. | Neither axis |
|
|
|
2.
|
On the stress-strain diagram, which axis would have units of force divided by
area?
a. | Stress | c. | Both axes | b. | Strain | d. | Neither axis |
|
|
|
3.
|
On the stress-strain diagram, which axis would have units of area divided by
force?
a. | Stress | c. | Both axes | b. | Strain | d. | Neither axis |
|
|
|
4.
|
Four solid, round bars are loaded in tension with the weights shown. In
which one is the greatest stress developed? Diameter, inches | Load, lbs. | 1.0 | 1000 | 2.0 | 2000 | 3.0 | 3000 | 4.0 | 4000 | | |
a. | The 1.0 diameter bar | c. | They are all experiencing the same stress | b. | The 4.0 diameter
bar | d. | The stress cannot be
determined |
|
|
|
5.
|
Four tensile test specimens are loaded with a load of 10,000 pounds. The
length of each specimen is recorded before and after it is loaded. Which specimen underwent the
highest strain? Original Length | New Length | 1 | 1.1 | 2 | 2.2 | 3 | 3.3 | 4 | 4.4 | | |
a. | The 1” long specimen | c. | The strain for all is the
same | b. | The 4” long specimen | d. | The strain cannot be calculated |
|
|
|
6.
|
A grams is a unit of ________?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
7.
|
A kilonewton is a unit of ________?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
8.
|
A megapascal is a unit of ________?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
9.
|
PSI are units of ________?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
10.
|
The kip is a unit of ________?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
11.
|
The ksi is a unit of _______?
a. | mass | c. | stress | b. | force | d. | strain |
|
|
|
Use the diagram below to answer the following questions. 
|
|
|
12.
|
What is the approximate UTS of the specimen?
a. | 350 MPa | c. | 560 MPa | b. | 650 MPa | d. | 0 MPa |
|
|
|
13.
|
The coordinates for two points on the elastic region of the diagram are shown
below. Calculate the modulus of elasticity for the elastic region. | | Strain (-/-) | Stress (MPa) | Point A | 0.000349 | 28 | Point B | 0.00204 | 262 | | | |
a. | 138,380 MPa | c. | 262 MPa | b. | 7.22E-06 MPa | d. | I can’t |
|