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