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TECH 1711 - Stress Strain Quiz

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