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13 Cards in this Set
- Front
- Back
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Which of the following are the three basic types of static stresses to which a material can be subjected? (3)
(a) compression (b) hardness (c) reduction in area (d) shear (e) tensile (f) true stress (g) yield |
compression, reduction in area, shear |
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Which one of the following is the correct definition of ultimate tensile strength, as derived from the results of a tensile test on a metal specimen? (a) the stress encountered when the stress-strain curve transforms from elastic to plastic behavior (b) the maximum load divided by the final area of the specimen (c) the maximum load divided by the original area of the specimen (d) the stress observed when the specimen finally fails |
the maximum load divided by the original area of the specimen |
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If the stress values were measured during a tensile test, which of the following would have the higher value? (a) engineering stress (b) true stress |
true stress |
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If strain measurements were made during a tensile test, which of the following would have the larger value? (a) engineering strain (b) true strain |
engineering strain |
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The plastic region of the stress-strain curve for a metal is characterized by a proportional relation - ship between stress and strain (a) true (b) false |
false |
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Which one of the following types of stress-strain relationship best describes the behavior of brittle materials such as ceramics and thermosetting plastics? (a) elastic and perfectly plastic (b) elastic and strain hardening (c) perfectly elastic (d) none of the above |
perfectly elastic |
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Which one of the following types of stress-strain relationships best describes the behavior of most metals at room temperature? (a) elastic and perfectly plastic (b) elastic and strain hardening (c) perfectly elastic (d) none of the above |
elastic and strain hardening |
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Which one of the following types of stress-strain relationship best describes the behavior of metals at temperatures above their respective re-crystallization points? (a) elastic and perfectly plastic (b) elastic and strain hardening (c) perfectly elastic (d) none of the above |
elastic and perfectly plastic |
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Which one of the following materials has the highest modulus of elasticity? (a) aluminum (b) diamond (c) steel (d) titanium (e) tungsten |
diamond |
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The shear strength of a metal is usually (a) greater then (b) less than its tensile strength |
less than its tensile strength |
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Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the indentation that results (a) true (b) false |
true |
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Which one of the following materials has the highest hardness? (a) alumina ceramic (b) gray cast iron (c) hardened tool steel (d) high carbon steel (e) polystyrene |
alumina ceramic |
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Viscosity can be defined as the ease with which a fluid flows (a) true (b) false |
false |
