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14 Cards in this Set
- Front
- Back
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which of the following materials has the highest degree of ductility a. high-carbon steel b. cast iron c. aluminum d. glass |
c. aluminum |
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generally speaking which of the following occurs in a material when strength and hardness increases? a. ductility decreases and the material becomes less brittle. b. ductility decreases and the material becomes more brittle. c. ductility increases and the material becomes less brittle. d ductility increases and the material becomes more brittle. |
b. ductility decreases and the material becomes more brittle. |
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a material that stretches considerable before breaking is considered to be ___________. a. brittle b. ductile c. very hard d. none of the above |
b. ductile |
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_______ strength is the ability to resist rotational shear. a. torsional b. ductile c. very hard d. none of the above |
a. torsional |
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GENERALLY SPEAKING, most metals have approximately equal abilities in resisting tension and compression. this is NOT true of _________. a. bronze b. steel c. gray cast iron d. wrought iron |
c. gray cast iron |
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percent elongation for a material is equal to which of the following? a. the percentage that a material stretched before breaking. b. the ratio of stress to strain, multiplied by 100% c. the ratio of strain to stress, multiplied by 100% d. none of the above. |
a. the percentage that a material stretched before breaking |
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which of the following is measured in the same units as stress? a. strain b. load c. percent elongation d. modulus of elasticity |
a. strain |
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a long, straight aluminum rod is formed into a "U" shape by bending manually.what is the type of stress developed in the rod? a. torsional b. flexural c. fatigue d. shear |
b. flexural |
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Poisson's ratio for material is equal to which of the following? a. the ratio of strain to stress. b. the ratio of stress to strain. c. the ratio of the strain in the loaded direction to the lateral strain. d. the ratio of the lateral strain to the strain in the loaded direction. |
d. the ratio of the lateral strain to the strain in the loaded direction. |
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the modulus of elasticity for a material is equal to which of the following? a. strain multiplied by stress b. stress divided by strain. c. strain divided by the stress d. deformation divided by original length |
b. stress divided by strain. |
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when referring to a stress-strain diagram, the modulus of elasticity for a material remains constant until the _____ is reached. a. proportional limit b. elastic limit c. yield point d. plastic range |
a. proportional limit |
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which of the following is true of creep? a. it occurs primarily in brittle materials. b. it occurs immediately when a material is loaded. c. it occurs when a material is held under load for long periods of time d. it is more pronounced a temperatures below 70 degrees. |
c. it occurs when a material is held under load for long periods of time |
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a material that can withstand prolonged levels of high voltage is considered to have a good ______. a. electrical conductivity b. electrical resistance c. dielectric strength d. none of the above |
c. dielectric strength |
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which of the following metals has the lowest degree of thermal conductivity? a. aluminum b. copper c. magnesium d. steel |
d. steel |
