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53 Cards in this Set
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Copper tube, tubing and fittings 060101i by JCW |
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Colours of copper tube |
Type K: Green Type L: Blue Type M: Red Type H: White Type DWV: Yellow |
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Three advantages of copper tube over steel pipe. |
Malleability Good resistance to corrosion |
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What are the three uses for DWV copper tube? |
Drain |
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Three applications of type K copper |
Water service lines Water distribution systems Low-pressure steam lines Heating systems Gasfitting DWV systems O2 and other specialized hospital piping systems Oil piping systems |
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Application for Type L tube in the Gas Industry and Plumbing |
Gas: below grade piping if factory coated. Above ground for all systems up to 1 1/4" NPS.
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What is the main application of Type M copper? |
Residential and light commercial. Water and heating lines. |
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Difference between Soft and hard temper copper tube. |
Soft copper can be bent without the use of spencial bending tools |
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Greatest disadvantage of copper pipe over iron or steel pipe? |
Rate of expansion |
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Minimum size (diameter) of Type K, L, M, and DWV |
K, L, and M; 1/4" DWV: 1 1/4" |
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Difference between oxygen tube and type K and L. |
O2 pipe is cleaned and capped from the factory. |
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Copper pipe is made from 99.7% pure copper. What does 99.7% pure copper mean? |
Its copper with 0.3% impurities |
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Metals and percentages for Yellow Brass, Red Brass, and bronze |
Yellow Brass: 66% Copper, 34% zinc Red Brass: 85% Copper, 15% zinc Bronze: 90% Copper, 10% tin |
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Types of copper tube used in hot and cold water lines |
K, L, M |
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Types of copper tube used in DWV systems |
DWV, K, L, M |
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Types of copper tube used in water heating system |
K, L, M |
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Types of copper tube used in steam heating systems |
Type K Type L |
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Types of copper used in underground gas applications |
Type K Type G |
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What does the abbreviation S.P.S mean when applied to copper pipe? |
Standard Pipe Size |
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Copper tube is lighter than the same size steel pipe, but copper is heavier than steel. Explain |
Copper has a higher relative density, but copper tube has a thinner inner wall. |
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What is the formula for pipe expansion Note: Coefficient of expansions will be given to you for your exam |
Coefficient x Length x Temperate change
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When do we start measuring the pipe from I.D to O.D? |
I.D for up to 12" O.D for 14" and over. |
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Copper tube used on drainage and venting can be joined by which two methods? |
Soldering |
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Copper tube as used for above ground water lines can be joined by which four methods? |
Soldering Brazing |
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Copper wrot fittings are considered better than cast brass fittings for soldering. Why? |
Because cast brass can have potential pin holes or sand holes. Copper wrot fittings won't have those. |
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Some water lines connected to some plumbing fixtures utilize a flexible tube connector. What type of seal is used on those? |
Compression ferrule. |
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A Tylok fitting differes from a standard compression fitting. Explain how. |
Tylok uses an additional ferrule. |
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Difference between a single and double flare. |
double flare has the end folded over into itself to provide a more thick wall. |
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What angle of flare is utilized in the plumbing trade? |
A 45 degree flare. |
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What are the maximum temperatures of substances that are conveyed in a soft soldered pipeline and the maximum steam pressure? |
121C or 250F and 15 PSIG |
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List three factors that would have a direct effect on the maximum pressure that could be carried in a soft solder pipeline. |
Temperature of the fluid in the line Size of the tube Types of solder |
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List the proper steps for making a good joint. |
Measure Mark Cut Ream Clean tube and fitting Flux tube and fitting Assemble and heat Solder Wipe clean |
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What does 50/50 and 95/5 mean when it comes to solder? |
50% tin and 50% lead 95% and 5% antimony |
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List two other names for "Mushy Range" |
Plastic Pasty |
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What does Eutectic Composition and is it a practical solder for making solder joints? |
It meas a specific alloy that melts at only one temperature and not a range. Meaning it's impractical for soldering. |
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State the liquidus temperature of the following: |
1) 240.C 464.F 2) 215.C 420.F 3) 230.C 450.F 4) 327.C 620.F 5) 335.C 635.F 6) 332.C 630.F |
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What could happens if you don't ream your pipe? |
Reduced pressure |
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What tools can you use to ream pipe? |
Blade reamers |
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List the primary two reeasons to flux |
To prevent oxidation To promote wetting of the metal |
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List three different types of torches used for soldering. |
Acetylene Propane MAPP gas Butane Gasoline |
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What is the purpose of a regulator on a soldering torch? |
To lower the tank pressure output to the desired hose or working pressure. |
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What are the components of red brass pipe and what method is used to join it? |
85% copper and 15% zinc
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What temperatures are used for soldering? |
Soldering - below 575C or 1000F
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What is a cast brass fitting? |
Cast brass - made from pouring molten brass into molds. Its not polished/finished so its rough and sandy Barstock - made from finished brass material, for smooth yellow apperance |
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What's another trade name for a Tylok fitting? What is it and what's special about it |
Swagelok |
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What's special about a high-pressure type of compression fitting? |
The compression sleeve has serated edges for improved grip. |
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Which organization set up the standard for flared fittings? |
American Society of Automotive Engineers (SAE) |
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What are the 3 basic designs for flares and which one do we use in the pipe trade? |
37 degree, 45 degree and inverted flare. |
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Torch tips are generally numbered to indicate tip size. What does the number mean? |
It roughly equals to the amount of fuel it uses per hour |
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What are the 4 types of torch fuels? |
Acetylene
Propane Butane |
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DWV is manufactured in what size and lengths? |
1 1/4" to 6" |
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What is another name for Standard Pipe Size? |
Steel Pipe Size |
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Regarding flexible tube connectors, what type of seal does that use? |
Compression with ferrule |