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).
Answer the following statement(s) true (T) or false (F)
Only qualified and trained persons should use builder’s transits and levels.
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.
Solid models developed with CAD may undergo ____________________ element analysis (FEA).
Fill in the blank(s) with the appropriate word(s).