The abbreviation for refrigerants containing fluorine, carbon, and hydrogen is ____.
A. HFC
B. HCFC
C. CFC
D. HFAC
Answer: A
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What are some of the ways we might group parts of a system?
What will be an ideal response?
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What are the hazards associated with an arc flash?
What will be an ideal response?
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In single-gang nonmetallic electrical device boxes, at least __________ of the Type NM cable sheathing must extend into the box.
a. 1/8 inches b. 1/4 inches c. 1/2 inches d. 3/4 inches
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Some specific common welded joints used in steel construction are exempt from tests and qualifications. The AISC and AWS refer to these joints as prequalified.
Answer the following statement true (T) or false (F)
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