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