All of the Following Statements About Biodegradable Polymers Are True

question 33

Multiple Choice

All of the following statements about biodegradable polymers are true EXCEPT

• A)some can biodegrade by composting.
• B)the most sustainable approach is to use renewable resources, especially non-food crops, as a monomer source.
• C)their glass transition temperatures are very high.
• D)many require microorganisms to degrade them.

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Definitions:

Castings

The process of pouring liquid metal into a mold, where it solidifies into a specific shape.

Material

The substance or substances out of which an object or item is made, which can influence its properties and usage.

Finishing

The process of applying final surface treatments to materials or components to achieve desired aesthetic or functional characteristics.

Machining Symbol

A type of symbol used on engineering drawings to indicate the type of machining operation required, surface texture, or surface roughness on a part.