Two refrigerants exempted from the EPA requirement to recover, recycle, and reclaim are _____.
a. ammonia and carbon dioxide
b. ammonia and hydrogen sulfide
c. carbon dioxide and hydrogen sulfide
d. hydrogen sulfide and butane
a. ammonia and carbon dioxide
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How many wraps of duct tape must be made around a flexible duct when it is attached to a round collar?
a. 1 b. 2 c. 3 d. 4
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Air compressors are used to operate _____.
a. pneumatic tools b. mud pumps c. welding machines d. hydraulic tools
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The element ____________________ is essential in the production of chlorophyll and gives plants a rich, green color
Fill in the blank(s) with correct word
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A hand reamer should be turned with an adjustable wrench
Indicate whether the statement is true or false
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