Of the two polystyrene foam insulations, one foamed with air and the other foamed with HCFC gas, which one is made by the extrusion process and which one is made by the molding process?
What will be an ideal response?
Expanded polystyrene (EPS) is made with molding process. Extruded polystyrene (XPS) is made with extrusion process.
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Explain how the direction of current flow determines the number of poles.
What will be an ideal response?
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The footing width is usually ____ the wall thickness and the footing depth is often equal to the wall thickness.
a.twice b.three times c.four times d.six times
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Explain why many parts cannot be drawn full size. What a draftsperson can do when this is the case?
What will be an ideal response?
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Discuss how copolymerization would affect crystallinity
What will be an ideal response?
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