Exam (elaborations)
NCCER Plumbing Level 1 Module_7 Copper Tubing and Fittings
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NCCER Plumbing Level 1 Module_7 Copper Tubing and Fittings
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NCCER Plumbing Level 1 Module_7Copper Tubing and Fittings
Annealed - ANS-Metal that has been heat treated to soften it, making it formable. Hard
drawn copper tubing is annealed to make it soft and formable.
Brazing - ANS-A heat bonding method of joining metals using another alloy with a
melting point lower than the metals being joined. Brazing uses filler metals that have a
melting point above 842* F.
Conductivity - ANS-The ability of an object to transfer heat or electricity to another
object.
Ferrule - ANS-A ring or bushing placed around a tube that squeeze's or bites into the
tube beneath when compressed, forming a seal
Halocarbon Refrigerant - ANS-Any of a class of organic compounds containing carbon
and one or more halogens, such as chlorine or fluorine. Refrigerants such as R22
contain chlorine which as been linked to the destruction of the ozone layer.
Hard Drawn - ANS-The process of heating copper and drawing it through dies to form
its shape and size.
Malleable - ANS-A characteristic of metal that allows it to be pressed or formed to some
degree without breaking or cracking. Copper is malleable while cast iron is not.
Oxidation - ANS-A chemical change in which a substance combines with oxygen, as
when iron oxidizes, forming rust
Pressure drop - ANS-A pressure decrease that occurs due to friction or obstructions as
an enclosed fluid flows from one point in a process to another
Soldering - ANS-A heat bonding method of joining metals using another alloy with a
melting point lower than the metals being joined. Soldering uses filler metals that have a
melting point below 842* F.
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