Chemically speaking, how can you raise the HDT of a polymer? (i.e. additives, processing, etc.)
What will be an ideal response?
To increase the HDT value of the material, increase the crystallinity of the material by making it more dense in structure through added hydrogen bonding. Another way to increase the HDT value would be to make the molecular weight of the material greater through cross-linking.
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The EPD of a product is classified under two types, which are
A) cradle-to-gate EPD and cradle-to-grave EPD. B) 50-year EPD and 100 -year EPD. C) cradle-to-grave EPD and cradle -to-cradle EPD. D) 60-year EPD and 100 -year EPD. E) 100-year EPD and life -cycle EPD.
The smaller size in a tolerance is called the ____.
A. lower-limit B. bottom-limit C. minimum D. floor
What controls the amount of gas entering the burner?
A) The gas manifold pressure and the burner venturi size B) The burner orifice size C) The draft created by the gas flames D) The gas valve
The written descriptions of the work and duties required of the owner, architect, and consulting engineer are
listed in the _____. a. notes b. schedules c. specifications d. standards