Is it possible to have a truly zero waste production system? Why or why not?

What will be an ideal response?


No, because (a) production systems and waste recovery and processing create unrecoverable energy losses, (b) products and materials have embedded entropy, and (c) the waste recovery and reprocessing system itself uses energy and other resources. Human society also uses materials and substances that cannot be readily recovered, recycled, or reprocessed for reuse. Finally, some synthetic and biomedical materials (such as fire retardants and radioactive dyes) are extremely useful and valuable, but also generate toxic and hazardous waste. In a complex industrial society, we will probably not be able to entirely eliminate such materials and products.

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When a backing weld or a melt-thru weld is to have a(n) ____________________ finished convex contour, this is indicated by adding the convex contour symbol and the finish abbreviation to the backing, back, or melt-thru symbol.

Fill in the blank(s) with the appropriate word(s).

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According to the textbook, how often should the oil be replaced in a vacuum pump?

a. After every 5 evacuations or after each evacuation of highly contaminated systems. b. When the oil turns white from moisture or dark amber from removing acid. c. Before each evacuation to make sure the pump is operating efficiently.

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The comprehensive component monitor will use one-trip logic when determining when to set a DTC and illuminate the MIL.

Answer the following statement true (T) or false (F)

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Hearing and listening are the same. They both involve a continuous level of understanding of what is being said.

Answer the following statement true (T) or false (F)

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