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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. 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
ductile to brittle transition
flexural strength
ASTM Standards
cantilever beam test
2. A property determined by measuring the change in the length of a sample to initial length of the sample
secondary creep
engineering stress
engineering strain
toughness
3. The ratio of the elastic energy to the strain at yielding - which determines how much energy will be used for deformation and how much will be translated to motion
toughness
larson - miller parameter LM
Rockwell Hardness Test
modulus of resistance
4. Method used to determine fatigue by alternating compressive and tensile forces on the sample
creep
secondary creep
cantilever beam test
true stress
5. The stress at the point of transition between elastic stretching and plastic deformation
yield strength
impact energy
hardness test
ductility
6. A specific method of measuring the resistance of a materials surface to penetration by a hard object under a static force
Rockwell Hardness Test
ASTM Standards
endurance limit
offset yield strenght
7. The transition of some metals in which a change in temperature causes them to transform between ductile and brittle behavior
Tensile Test
hardness
ductile to brittle transition
Brinell Hardness HB
8. The final stage of creep - during which the rate of deformations accelerates rapidly and continues until rupture
ductile to brittle transition
engineering stress
tertiary creep
fatigue
9. The region on the stress - strain curve in which the material has experienced a change from which it will not completely recover
plane strain fracture toughness
plastic deformation
Rockwell Hardness Test
Brinell Hardness HB
10. The value that the stress concentration factor must exceed to allow a crack to propogate
cantilever beam test
izod test
fracture toughness
ductility
11. Term that accounts for the increased stress applied to an elliptical crack whose length is much greater than its width
yield strength
variance
stress intensity factor
Tensile Test
12. The region on a stress - strain curve in which no permanent changes to the material occur
Bend Test
error bar
elastic stretching
yield strength
13. The stress at which the material breaks completely during tensile testing
fatigue life
Moh Hardness
out- of- plane shear
breaking strength
14. One of the many scales used to evaluate the resistance of a materials surface to penetration by a hard object under static force
variance
ASTM Standards
Brinell Hardness HB
flexural strength
15. The ratio of applied load to cross - sectional area
standard deviation
hardness test
engineering stress
modulus of resistance
16. A method used to determine the tensile strength - breaking strength - and the yield strength of a sample
izod test
ductile to brittle transition
Tensile Test
stress concentration factor
17. Test that approximate the impact of an environmental variable on a material over time by exposing the material to a higher level of that variable for shorter times
confidence limit
t- table
accelerated aging studies
plastic deformation
18. A statistical table based on the degrees of freedom and the level of uncertainty in a set of reported sample values
breaking strength
t- table
secondary creep
Bend Test
19. The amount of energy lost as the test sample is destroyed during an impact test
Bend Test
plane strain fracture toughness
engineering stress
impact energy
20. A ratio of the force applied to a sample and the instantaneous length of the chain to the initial length of the chain
elastic stretching
true stress
t- table
larson - miller parameter LM
21. The fracture toughness above the critical thickness in which the width of the material no longer impacts the fracture toughness
plane strain fracture toughness
stress raisers
secondary creep
creep
22. The change in the slope of the strain - time plot at any given point during a creep test
out- of- plane shear
endurance limit
equivalent property time EPT
creep rate
23. A single blow test names after Charpy in which a notched test sample is broken by a swinging pendulum
modulus of resistance
engineering stress
Charpy Impact Test
fatigue life
24. A value used to characterized creep based on time - temperature - and material- specific constants
necking
modulus of resistance
larson - miller parameter LM
tertiary creep
25. Stresses that act perpendicularly to the direction of the crack - causing the crack ends to pull apart and opening the crack further
yield strength
primary creep
variance
opening stresses
26. The study of crack growth leading to material failure
impact energy
fracture mechanics
brittle
error bar
27. The ease with which a material deforms without breaking
ductility
poisson's ratio
out- of- plane shear
pooled variance
28. 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
elastic energy
error bar
engineering strain
yield strength
29. The stress level below which there is a 50% probability that failure will never occur
stress concentration factor
fatigue
endurance limit
Brinell Hardness HB
30. The application of stress perpendicular to a crack - wich pulls the top and bottom potions in opposite directions
Rockwell Hardness Test
yield strength
plastic deformation
out- of- plane shear
31. The square root of the variance. this value provides more knowledge about the distance from the mean a random sample is likely to be
offset yield strenght
standard deviation
plane strain fracture toughness
toughness
32. 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
creep
secondary creep
elastic energy
stress concentration factor
33. The first stage of creep - during which dislocations in a material slip and move around obstacles
toughness
primary creep
elastic stretching
pooled variance
34. An estimate of the transition between elastic stretching and plastic deformation for a material without a linear region stress - strain curve
offset yield strenght
Rockwell Hardness Test
pooled variance
Moh Hardness
35. A value used to determine if two distinct sets of examples are statistically different
ductile to brittle transition
pooled variance
larson - miller parameter LM
elastic modulus
36. The sudden decrease in cross - sectional area of a region of a sample under a tensile load
secondary creep
hardness
Tensile Test
necking
37. A property defining a materials resistance to a blow that is measured by an impact test
error bar
hardness test
toughness
elastic energy
38. 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
ductile to brittle transition
elastic modulus
engineering stress
39. Materials that can plastically deform without breaking
fracture mechanics
stress intensity factor
ductile
engineering strain
40. A method used to measure the flexural strength of a sample
Bend Test
offset yield strenght
fracture mechanics
equivalent property time EPT
41. A nonlinear - qualitative scaled used to evaluate the resistance of a materials surface to penetration by a hard object
elastic modulus
Charpy Impact Test
Moh Hardness
Rockwell Hardness Test
42. Cracks - voids - and other inperfections in a material that cause highly localized increases in stress
fatigue life
impact energy
stress raisers
ductile
43. A statistical quantity that takes into account the random error from a variety of sources and provides infromation about the spread of the data
variance
true stress
ductile to brittle transition
ASTM Standards
44. Plastic deformation of a material under stress at elevated temperatures; occurs due to dislocations in the material
primary creep
in - plane shear
creep
true stress
45. The ratio of the maximum stress to the applied stress
fatigue
stress concentration factor
secondary creep
nominal stress
46. Stress values not involving the presence of stress raisers in the material
nominal stress
fracture mechanics
necking
pooled variance
47. The number of cycles at a given stress level that a material can experience before failing
stress concentration factor
primary creep
ductile
fatigue life
48. The degree of certainty in an estimate of a mean
confidence limit
in - plane shear
tensile strength
Brinell Hardness HB
49. The application of stresses parallel to a crack causing the top portion to be pushed forward and the bottom portion to be pulled in the opposite direction
ductility
Rockwell Hardness Test
cantilever beam test
in - plane shear
50. 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
S- N Curve
offset yield strenght
accelerated aging studies