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42 Cards in this Set
- Front
- Back
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Minimum pipe size for building sewer connected to public sewer |
4” |
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Minimum size for building cleanout in Canada? |
4” |
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Minimum slope of a trap arm must be what %? |
2% |
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Minimum main stack size for single family dwelling? |
3” |
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If a sewer is opened and a characteristic rotten egg smell is detected which gas should be suspected? |
Hydrogen sulphide |
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Maximum direction change on a trap arm? |
Dependent on type of discharge the fixture will have |
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No water closet may be installed in a room that is not: a. Waterproof b. Properly lighted and ventilated c. Equipped with a lav d. Suitable for privacy |
B |
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Minimum size of wet vent serving WC |
2” |
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Maximum size of of trap arm draining into wet vent? |
2” with exception of emergency floor drain |
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What type of valve is most widely used in the industry? |
Ball valve |
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Two main types of checkvalves |
Lift check Swing check |
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What type of valve is most suited for throtting? |
Globe valve |
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4 disc types for globe valves? |
Conventional Composition Plug Needle |
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Which 4 valves can accommodate flow in either direction? |
Gate Ball Plug Butterly |
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What color is abs dwv? |
Black |
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Which plastic DWV pipe has highest temp resistance? |
ABS |
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Which plastic pipe is used for underground gas? |
High density polyethylene |
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Nesting pipes refers to? |
Storing smaller diameter pipes in larger diameter pipes |
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2 plastic tubes best suited for radiant panel heating? |
Pex Pe/al/pe |
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When connecting plastic to metal pipe with a thread the plastic must have the _______ thread |
MIP |
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What types of plastic produce toxic gases? |
PVC/ CPVC |
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What is used to keep plastic pipe round when threading? |
A round wooden plug |
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What are the 3 methods of joining cast iron pipe approved by the NPC? |
Lead and oakum Mechanical joint Compression joint |
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When installing bell and spigot cast iron, in which direction should the sewage flow through the pipe? |
Out of the spigot into the hub |
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When installing bell and spigot cast iron, in which direction should the sewage flow through the pipe? |
Out of the spigot into the hub |
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2 methods of cutting cast iron? |
Snap cutters Hammer and chisel |
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2 Disadvantages of cast iron vs copper pipe |
Heavier Poor resistance to shock |
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How is glass pipe joined? |
Mechanical joint couplings |
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List one advantage of glass pipe |
Low expansion rate |
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List one advantage of glass pipe |
Low expansion rate |
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List 2 methods for joining fibreglass pipe. |
Butt and strap Bell and spigot Flanged Threaded and bonded O ring bell and spigot |
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What is the safety concern when using lead? |
It is known to cause cancer in the state of california |
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Name 4 historical piping systems. |
Lead pipe Bituminized pipe Vitrified clay pipe Aluminum pipe Caulked cast iron Asbestos cement soil pipe Wood pipe |
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Which grade of threaded pipe should be used with max pressure of 1000psi? |
XXS |
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What does the schedule number on a pipe designate? |
Pressure/stress ration x1000 |
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What are alloys in metal pipes? |
Other material mixed with iron to produce special qualities in pipe |
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What is the angle on a national or american standard pipe thread? |
60 degrees |
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Why is dope applied to threaded joints? |
Lubrication |
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Two types of steel pipe cutters? |
Single wheel Multi-wheel |
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As pipe size increases the number of threads per inch generally ____________. |
Decreases |
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All pipe fittings have a _____________ thread |
Tapered |
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Where would you see a parallel thread? |
A bolt |
