A source of pollution that is harder to trace, such as debris blown by the wind, is called a:

A. non-point source
B. point source
C. known source
D. carried source


Answer: A

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If you have a raceway with 35 current-carrying conductors, by what adjustment factor must you multiply the ampacity?

A. 0.2 B. 0.3 C. 0.4 D. 0.5

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The requirement that foundations must be built in excavations that are "in the dry" means that _____.

a. water cannot be applied during compaction b. the excavations must be free of water c. work must be stopped on rainy days d. groundwater barriers must be installed

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A cold frame with a heat source is called a:

a. hot frame c. hotbed b. warm house d. warming shed

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Explain why furnace efficiencies jump from 80% to 90%

What will be an ideal response?

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