For cleaning ACR copper tubing before soldering, a material that can be used is ____.

A. steel wool
B. carborundum cloth
C. sand cloth
D. nylon wool


Answer: C

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Pipe ____________________ are drawings use special sets of symbols to identify the components of piping systems, including pipe, valves, fittings, flanges, and equipment.

Fill in the blank(s) with the appropriate word(s).

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Answer the following statement(s) true (T) or false (F)

Only qualified and trained persons should use builder’s transits and levels.

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When refrigerants are exposed to glowing metal surfaces or flames:

A) Carbon monoxide is produced and should be vented. B) A respirator capable of filtering fine dust must be worn. C) Lethal phosgene gas is produced. D) Best practices require the use of proper eye protection.

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Solid models developed with CAD may undergo ____________________ element analysis (FEA).

Fill in the blank(s) with the appropriate word(s).

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