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