Sweating when we work is an example of cooling by:
A) Conduction. B) Convection. C) Radiation. D) Evaporation.
D
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Research shows that the more chemicals there are in the air, the harder ____ work to remove them,
with rates of removal dropping when levels of toxins subside.
a. VOCs c. air purifiers b. plants d. humidity levels
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Structural ____ involved in a job using a wooden roof are required to draw roof configuration diagrams.
A. drafting clerks B. CAD technicians C. CAD managers D. site engineers
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Which of the following ferrous metals has the largest amount of carbon?
A) Cast iron B) Steel C) Wrought iron
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When installing an overhead service, __________ feet of conductor should stick out of the weatherhead for the formation of a drip loop.
a. 1 b. 1.5 c. 2 d. 3
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