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Test your basic knowledge |
Modern Material Science And Engineering 4
Start Test
Study First
Subject
:
engineering
Instructions:
Answer
50
questions in
15 minutes
.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The ratio of the maximum stress to the applied stress
creep rate
secondary creep
primary creep
stress concentration factor
2. A statistical quantity that takes into account the random error from a variety of sources and provides infromation about the spread of the data
elastic modulus
Moh Hardness
creep rate
variance
3. The ease with which a material deforms without breaking
accelerated aging studies
ductility
opening stresses
equivalent property time EPT
4. The region on a stress - strain curve in which no permanent changes to the material occur
hardness test
elastic stretching
Rockwell Hardness Test
fracture mechanics
5. A single blow test names after Charpy in which a notched test sample is broken by a swinging pendulum
yield strength
Charpy Impact Test
stress intensity factor
secondary creep
6. The area contained under the elastic portion of a stress - strain curve - which represent how much energy the material can absorb before permanently beforming
elastic energy
secondary creep
hardness
elastic stretching
7. An impact test similar to the charpy test in which the sample is aligned vertically with the notch facing away from the hammer
izod test
impact energy
poisson's ratio
larson - miller parameter LM
8. The sudden decrease in cross - sectional area of a region of a sample under a tensile load
accelerated aging studies
necking
modulus of resistance
ductile to brittle transition
9. The first stage of creep - during which dislocations in a material slip and move around obstacles
primary creep
toughness
flexural strength
breaking strength
10. The change in the slope of the strain - time plot at any given point during a creep test
Moh Hardness
creep rate
nominal stress
standard deviation
11. A value used to characterized creep based on time - temperature - and material- specific constants
elastic modulus
larson - miller parameter LM
fracture mechanics
ductile
12. The application of stress perpendicular to a crack - wich pulls the top and bottom potions in opposite directions
toughness
out- of- plane shear
stress concentration factor
ductile to brittle transition
13. An estimate of the transition between elastic stretching and plastic deformation for a material without a linear region stress - strain curve
elastic stretching
out- of- plane shear
offset yield strenght
cantilever beam test
14. Guidelines published by the American Society for Testing and Materials that provide detailed testing procedures to ensure that tests performed in different laboratories are directly comparable
ASTM Standards
stress intensity factor
plane strain fracture toughness
breaking strength
15. Stress values not involving the presence of stress raisers in the material
Charpy Impact Test
nominal stress
breaking strength
in - plane shear
16. The study of crack growth leading to material failure
opening stresses
breaking strength
fracture mechanics
necking
17. Stresses that act perpendicularly to the direction of the crack - causing the crack ends to pull apart and opening the crack further
secondary creep
Brinell Hardness HB
creep
opening stresses
18. The slope of the stress - strain curve in the elastic region. aka Young's Modulus and Tensile Modulus
izod test
elastic modulus
modulus of resistance
fracture mechanics
19. A statistical table based on the degrees of freedom and the level of uncertainty in a set of reported sample values
pooled variance
t- table
fatigue
toughness
20. The fracture toughness above the critical thickness in which the width of the material no longer impacts the fracture toughness
Moh Hardness
offset yield strenght
plane strain fracture toughness
Tensile Test
21. A curve plotting the results of testing multiple samples at different stress levels that used to to determine the fatigue life of a material at a given stress level
S- N Curve
stress concentration factor
plastic deformation
hardness test
22. The stress at the highest applied force on a stress - strain curve
tensile strength
true stress
nominal stress
Charpy Impact Test
23. Term that accounts for the increased stress applied to an elliptical crack whose length is much greater than its width
elastic stretching
ductile
stress intensity factor
hardness
24. Cracks - voids - and other inperfections in a material that cause highly localized increases in stress
accelerated aging studies
engineering strain
stress raisers
endurance limit
25. The stage in which the rate that dislocations propagate equals the rate at which the dislocations are blocked - resulting in a fairly linear region on the strain - time plot
fracture mechanics
engineering stress
flexural strength
secondary creep
26. A specific method of measuring the resistance of a materials surface to penetration by a hard object under a static force
Rockwell Hardness Test
breaking strength
fracture mechanics
primary creep
27. The region on the stress - strain curve in which the material has experienced a change from which it will not completely recover
fatigue
stress intensity factor
Rockwell Hardness Test
plastic deformation
28. A period used to force the same aging processes to occur on a sample in a shorter amount of time
breaking strength
Moh Hardness
engineering strain
equivalent property time EPT
29. Relates the longitudinal deformation and the lateral deformation of material under stress
30. Materials that can plastically deform without breaking
hardness test
confidence limit
ductile
error bar
31. The final stage of creep - during which the rate of deformations accelerates rapidly and continues until rupture
engineering stress
tertiary creep
t- table
error bar
32. One of the many scales used to evaluate the resistance of a materials surface to penetration by a hard object under static force
cantilever beam test
error bar
Brinell Hardness HB
primary creep
33. A method used to measure the flexural strength of a sample
pooled variance
Bend Test
ASTM Standards
Tensile Test
34. A property defining a materials resistance to a blow that is measured by an impact test
pooled variance
Tensile Test
fatigue life
toughness
35. The number of cycles at a given stress level that a material can experience before failing
Brinell Hardness HB
fatigue life
error bar
equivalent property time EPT
36. A limit placed on the accuracy of a reported mean - based on the number of samples tested - the standard deviation - and the desired level of confidence
Moh Hardness
toughness
error bar
variance
37. A nonlinear - qualitative scaled used to evaluate the resistance of a materials surface to penetration by a hard object
true stress
stress intensity factor
Moh Hardness
plastic deformation
38. Method used to determine fatigue by alternating compressive and tensile forces on the sample
endurance limit
confidence limit
izod test
cantilever beam test
39. Plastic deformation of a material under stress at elevated temperatures; occurs due to dislocations in the material
creep
opening stresses
t- table
stress concentration factor
40. The degree of certainty in an estimate of a mean
confidence limit
pooled variance
cantilever beam test
ASTM Standards
41. A value used to determine if two distinct sets of examples are statistically different
poisson's ratio
pooled variance
flexural strength
plane strain fracture toughness
42. Failure because of repeated stresses bellow the yield strength
fatigue
t- table
ductility
confidence limit
43. A method used to determine the tensile strength - breaking strength - and the yield strength of a sample
true stress
creep
plastic deformation
Tensile Test
44. A property determined by measuring the change in the length of a sample to initial length of the sample
engineering strain
impact energy
true stress
stress concentration factor
45. A method used to measure the resistance of the surface of a material to penetration by a hard object under a static force
stress raisers
accelerated aging studies
hardness test
plastic deformation
46. The amount of flexural stress a material can withstand before breaking. measured through the bend test
hardness
opening stresses
flexural strength
tertiary creep
47. The resistance of the surface of a material to penetration by a hard object under static force
true stress
yield strength
fatigue
hardness
48. The ratio of applied load to cross - sectional area
breaking strength
engineering stress
tensile strength
error bar
49. The square root of the variance. this value provides more knowledge about the distance from the mean a random sample is likely to be
fracture toughness
standard deviation
offset yield strenght
primary creep
50. Materials that fail completely at the onset of plastic deformation. these materials have linear stress - strain curves
hardness test
nominal stress
brittle
ductility