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Granite is what type of rock? |
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Sandstone and limestone are what kind of rocks? |
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Marble and slate are what kind of rocks? |
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Stone used with little or no shaping is called what? |
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Stone with slightly shaped edges resulting in vertical joints is called what? |
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Highly shaped stone is called what? |
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Who developed a process to making steel inexpensively in 1856? |
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The process of refining the ores to extract the pure metal is know as what? |
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What's the difference between cold rolling and hot rolling? |
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Hot rolling tends to eliminate flaws in the metal.
Cold rolling increases the metal's strength and elastic limit but decreases its ductility |
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What is the difference between extruding and drawing? |
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extruding pushes metal through a die. drawing pulls |
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What is the process in which metal is reheated and slowly cooled to obtain a more ductile material? |
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Involves heating the metal to a certain temperature and then rapidly cooling it by complete submersion in water or some other liquid? |
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What's the difference between tempering and quenching? |
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tempering does not involve rapid cooling |
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Where is galvanic action most severe? |
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Humid, marine environments |
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One that contains lots of iron |
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Iron with a very low carbon content and a substantial amount of slag.
Sof, ductile, and resitant to corrosion. |
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Iron with a carbon content above 2%.
Very hard and very brittle. |
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How much carbon does standard structural steel have? |
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Steel alloy containing minimum of 11% chromium. |
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a layer of nonreactive olecules does not allow metal ions at the surface to mitgate into solution. |
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Stainless steel finishes:
- No. 3
- No. 4
- No. 6
- No. 7
- No. 8
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- No. 3 - an intermediate, dull finish, coarser than no. 4
- No. 4 - a general purpose polished finish that is dull and prevents mirror reflection. Most frequent
- No. 6 - a dull satin finish
- No. 7 - a highly reflective polished surface
- No. 8 - the most reflective, used for mirrors and reflectors.
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Types of Stainless Steel:
- Type 302
- Type 304
- Type 301
- Type 316
- Type 430
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Type 302 - contains 18% chromium and 8 % nickel.
Type 304 - replaced Type 302 because of improved weldability.
Type 301 - similar to Type 302, but with smaller amounts of chromium and nickel. High tensile strength
Type 316 - extreme corrosive environments
Type 430 - no nickel, less corrosion resistant, interior applications |
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What is main problem with anodized aluminum finish? |
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Difference between bronze and brass? |
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bronze is alloy of copper and tin
brass is alloy of copper and zinc |
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What is difference between bars and plates? |
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Bars are rectangular section 6" or less with thickness of 0.203" and greater or 6"-8" with thickness greater than 0.203"
Plates are over 8" in width with thickness of 0.230" and over or over 28" in width with a thickness of 0.180" or over |
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What is yard lumber and factory and shop lumber? |
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Definition
Yard lumber is used for structural purposes and rough framing
Factory and shop lumber - Making door frames, windows, and finish items. |
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Advantages of platform and balloon framing? |
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Definition
platform - each floor can be completed and used for constructing the next, shorter studs cost less
balloon - vertical shrinkage is limited |
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What are advantages of SIPs? |
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Definition
- Decreased construction time
- Improved insulation value with no thermal bridges
- Reduced air infiltration
- Strong than conventional stud and sheating construction
- Very flat for subsequent finishes
- Dimenional stability
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Define Thermoset plastics? |
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Definition
Those that permanently harden when they are subjected to heat and then cured. EPDM, CSPE |
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Define Thermoplastic materials? |
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Can be repeatedly softened with heat and then harden again when cooled. PVC, TPO |
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What color are PVC and TPO |
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Definition
white. good for cool roof systems |
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Is TPO more expensive than EPDM? |
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When are reinforced membranes a good idea? |
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high wind conditions and where heavy foot traffic is expected. Must be fully adhered or mechanically attached. |
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What are liquid applied roofings good for? |
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Definition
roofs with complex shapes like thin-shell concrete domes. |
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Can all glass doors be fire rated? |
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