If soil pH was observed to gradually increase and then gradually decrease over a 4-6 year period, what chemical(s) had probably been added to the soil at the start of this period:

a. Aluminum
b. An excess of hydrogen ions
c. Calcium carbonate
d. An ammonium containing nitrogen fertilizer


Ans: c. Calcium carbonate

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A biomass source that has been burned as fuel since the days of the wagon trails is ____________________

Fill in the blank(s) with correct word

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Describe how Deming's plan-do-check-act cycle might be applied in improving a construction company's procedures for scheduling subcontractors' work on a construction project

What will be an ideal response?

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Purging refrigerant lines with nitrogen during their installation prevents _____

a. acid formation b. overheating c. copper oxide formation d. corrosion buildup

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Loads on structures are studied during which stage of the design process?

A. manufacturing study B. concept study C. analysis D. cost study

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