If a trench is dug in Type B soil that does not require sheeting, but may experience minor raveling, workers should use _____.
a. skip-shoring
b. spot bracing
c. vertical shores with plywood
d. stacked shoring
c. vertical shores with plywood
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Approximately how many species of mosquitoes are known in North America?
A. 50 B. 100 C. 150 D. 500
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In areas where the climate is mild, llamas and alpacas require little or no _____.
Fill in the blank(s) with the appropriate word(s).
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How many paving bricks are needed to cover a concrete patio having a length of 24' and a width of 16'?
What will be an ideal response?
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Buildings with hydronic heating systems have shown ____ heating energy use compared to equivalent structures with forced-air heating systems.
a. higher b. lower c. equal d. unquantifiable
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