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33 Cards in this Set
- Front
- Back
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A ferrous metal has a high content of? |
Iron |
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Describe a non-ferrous metal. |
Contains little or no iron and is usually non-magnetic |
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A metal that is red or yellow is most likely what type of metal? |
Copper or brass |
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What is the normal colour for steels and cast irons? |
Silvery grey |
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If a metal that has been fractured shows a dull grey appearance in it's internal structure, with no bending before breaking, it is most likely: |
Grey cast iron |
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Given two identical pieces of zinc die cast and aluminum, what should be the simplest way to identify them? |
By weight |
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If an object is irregularly shaped, what might you conclude about the object. |
It is a casting |
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If a piece of metal has a smooth outer surface, what might you conclude about the object? |
It has been formed. |
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In using a chip test to identify a metal, what should a smooth continuous chip indicate? |
A soft material like aluminum |
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How is cast iron distinguished from low carbon steel in a spark test? |
Sparks given off by cast iron are short with red bursts near the grinder. |
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How can using a new hand-held file give you an estimate of a metals hardness? |
If the file bites into the metal easily, it is likely a soft material. |
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What is the approximate harness rating of low carbon steel on the Brinell Hardness scale? |
100 |
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Which metal will burn violently when ignited using flame test? |
Magnesium |
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When the heat code identification number is cut from a piece of plate, what should you do? |
Transfer the ID number to the remaining plate |
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What is the most precise method for the identification of a metal that has been shipped from a steel mill? |
Study the mill test report |
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In addition to the mill test report, what else do steel mills usually attach to the straps that hold the bundles of bar stock together? |
Metal specification tags |
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This term describes the resistance of a material to a force that tends to deform or cause failure by crushing. |
Compressive strength |
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The maximum load required to punch through a metal is used to determine the: |
Shear strength |
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What term best describes the resistance of a material to a force that is trying to pull it apart? |
Tensile strenght |
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Which term describes the ability of a metal to be cold worked without a great deal of resistance? |
Malleability |
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Which term describes a material that shows no permanent distortion before failure? |
Brittleness |
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Which term describes the ability of a metal to resist indentation or penetration? |
Hardness |
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Which term describes the ability or a metal to withstand the shock of a rapidly applied load? |
Toughness |
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This term describes the ability of a metal to return to its original state after a load has been removed. |
Elasticity |
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This term describes the ability of a metal to be cold worked without a great deal of resistance. |
Malleability |
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The point at which permanent deformation takes place is known as? |
Yield strength |
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Which term describes the ability of a metal to withstand a sharp, high-velocity blow? |
Impact strength |
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Density is defined as weight per unit volume. What is the density of steel? |
0.283lb/in3 |
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Which term describes the ability of a metal to resist wasting away by slow gradual combination with other elements and chemical compounds? |
Corrosion resistance |
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Which term describes the rate at which electric current flows through a metal? |
Electrical conductivity |
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Which term best describes the rate at which heat flows through a metal? |
Thermal conductivity |
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Which term describes the extent of increase in physical dimensions due to a change in the metals temperature? |
Thermal expansion rate |
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The temperature at which a metal changes to liquid form is called its.... |
Melting point |
