Plumbing Theory Period 1 (CND) Flashcards
If you can’t vent, conduct a air quality test & wear a SCBA?
Do not entre!
The ration of apprentices to journeymen?
2 apprentices for the 1st journeymen & then a 1:1 ratio after
L.A.C?
local apprenticeship committee
P.A.C?
Provincial apprenticeship committee
A vertical piping arrangement for drainage & venting in which small diameter trap arms are placed above larger diameter trap arms?
A Stack vented group
Any liquid waste other than clear-water or storm water?
Sewage
A vent pipe that connects the top of a soil or waste stack to a vent header or open air?
Stack vent
Minimum size of a main stack for a single family dwelling?
3” Stack
Maximum size of a trap arm that may drain into a wet vent?
2” (50mm) with the exception of a emergency floor drain
maximum size of a wet vent that serves a water closet?
2” (50mm)
Minimum size of a building cleanout fitting that maybe installed is?
4”
Minimum pipe size for a building sewer that is to be connected to a public sewer?
4”
piping places underground must be covered with a minimum of?
300mm of granular material, carefully placed & tamped over the pipe
Minimum slope to which a trap arm must be installed?
2% grade
A properly piped wet vented group of fixtures that includes a water closet. Where is the water closet placed?
the water closet must be piped as the lowest vented fixture.
Trap arm size is based on?
Fixture outlet pipe size
Excavation for building sewers must be?
Preceded by utility locator services
No water closet maybe installed in a room that is not?
Properly lighted or vented
maximum direction of change a trap arm have before a vent fitting must be place is?
Dependant on the type of discharge the fixture will have
Gravity drainage in a horizontal piping should move at a speed of?
Approx. 2ft per second or 600mm per second
ideally flow rates should keep a drainage pipe at least?
1/3 to 1/2 full
The term for any vertical soil & waste piping that passes through a minimum of one story of a building is ?
is called a Stack
Trap arms of fixtures that do not use siphonic action may change direction in the horizontal plane a max of?
135 degrees
the max allowable vertical distance between the fixture & the trap must not exceed ______ inches or _____mm.
36” or 900mm
The min. distance between the vent & the trap must not be?
less than twice the size of the fixture drain.
The min. for the trap seal is?
38mm or 1-1/2” with exception to acid waste trap seals being 2” or 50mm
Flat vent is a trade name for a vent that needs a ?
Cleanout
2 or more dry vents connecting together?
A branch vent
An individual vent becomes a stack vent when?
a fixture drain extends through at least one complete story.
The min drainage pipe size required for a lavatory is?
1-1/4”
What is the primary function of a trap?
to keep sewer gas from entering into a building.
Which trap is prohibited from use in the plumbing system?
Bell trap
The size of a trap that serves 2 lavatories?
1-1/2”
What would happen if the fall on a trap arm was more than one pipe diameter?
the trap ma self-syphon
A trap too far below a fixture will?
Self- Syphon
what kind of syphonage occurs when a fixture outlet pipe is too long?
momentum syphonage
The developed length of the fixture outlet pipe from the farthest fixture shall not exceed?
900mm (3ft)
Clean out size and spacing must follow which table?
Table 2.4.7.2 in the code book
Min size of a building sewer cleanout fitting maybe installed?
3”
Kitchen sink fixture drain requires a cleanout for all change of directions that total?
90 degrees of change between cleanouts
A 4” building sewer requires a?
4” building cleanout
A building sewer 8” or over in size requires ?
a manhole as the cleanout
3” floor drain is considered as being vented through the building drain when the?
Fixture drain is no longer than 12ft
Line cleanouts on a stack or straight run of piping & fitting cleanouts placed in the branch of a Y fitting count as a?
45 degree change of direction for the cleaning tool.
A cleaning tool should pass through changes of direction in a drain adding up to no more than?
135 degrees
A manhole located inside a building must have an?
Air tight seal & be vented
A trap cleanout maybe used for?
Cleaning the trap
Tests allowed to be conducted for DWV rough-in piping are?
water test, air test, & ball test
Where does the building sewer begin?
1m outside the foundation wall
Plunger works best when the blockage is?
Upstream of the fixture vent fitting.
A top snake is ?
A hand operated drain cleaner
Is only useful to clear a blockage located in a water closest trap way?
Water closet auger
Drainage tapes maybe?
hand operated only
If a drain cleaning cable breaks in the drain it maybe caught & removed with a?
retrieval head
Sewer rodding machines are used to ?
Large straight runs of pipe
Chemical drain cleaners are capable of aggressive reactions resulting in ?
Harmful or offensive gases
Acid drain cleaners react with H2O in the drain to produce?
Hydrochloric Acid
the electrically operated drain gun is an adaption of the?
Top snake
The drain gun should only be used on?
Small drains
All running traps must have a ?
Cleanout over top of them
what is the min. length for a 3” non-vented floor drain trap arm?
18”
max distance between the vent & the trap is measured from?
the trap weir to the vent pipe fitting
what is the max distance between the vent pipe & a 4” trap?
32ft (9.8m)
A properly installed pedestal basin should be mainly supported by only?
Brackets places on the wall where the fixture is to sit.
The PH level of natural precipitation is commonly closed to?
5.6
Vent pipe roof terminal assemblies need to be?
Carefully located & appropriately constructed
a sewer that is installed to convey storm water is a?
Storm Sewer
Measure a long centre line of the pipe?
Developed length
Min diameter of a fixture outlet pipe?
1-1/2” 38mm
An important difference between manholes & catch basins are?
Applications
Min distance for a trap arm on a lav.?
3” or 2x the pipe diameter
max distance for a trap arm on a lav.?
1.8m or 6ft
max. distance between the vent pipe & a 1-1/4” trap?
1.5m or 5ft
Max distance between the vent pipe & 1-1/2” trap?
1.8m or 6ft
max distance between the vent pipe & a 2” trap?
2.4m or 8ft
max distance between the vent pipe & a 3” trap?
3.6m or 12ft
max distance between the vent pipe & a 4” trap?
9.8m or 32ft
The max distance between the vent & the trap is measured from & to?
Centre line of the vent to the weir of the trap
The max drop on a horizontal drain & the vent pipe connection must not exceed?
The diameter of the pipe
Min. distance between the vent & the trap must not be less than?
twice the size of the fixture drain
The best arrangement for venting because waste water does not entre the vent pipe?
the continuous waste & vent principle connection
May allow fixture to self syphon?
trap to low below the fixture
Vent pipe roof flashing must be compatible with the vent pipe material to avoid ?
Electro-chemical corrosion
A vent connection fitting paced on a trap arm must have the?
The vent opening arranged above the horizontal centre line of the trap arm
True or False: All ball cocks will be of the anti-siphon type?
True
Is operated by the tank flush lever flush lever and holds water in the tank until the toilet is flushed?
A flapper or flush actuator
Fixtures considered as a bathroom group in a residence are?
The tub or shower, the toilet and the basin
A close coupled water closet differs from a low or high tank closet by?
The way the tank is mounted.
A properly installed pedestal basin should be mainly supported by only?
Brackets placed on the wall where the fixture is to sit
True or False: All ball cocks will be of the anti-siphon type?
True
Is operated by the tank flush lever & holds water in the tank until the toilet is flushed?
A flapper or flush actuator
Fixtures considered as a bathroom room?
The tub and/or shower, toilet & basin
A close-couple water closet differs from a low or high tank water closet by?
The way the tank is mounted
Is installed before drywall or plaster is placed on the wall?
A recessed tub
A properly installed pedestal basin should be mainly supported by only?
Brackets placed on the wall where the fixture is to sit.
What shows rough dimensions of fixtures & supplies piping locations?
Fixture rough in manuals
The residential fixture that requires a shut off valve on its water supply piping?
The water closet
Kitchen sinks do not have concealed over flow arrangements because?
Food & grease can collect in the overflow creating an unsanitary condition.
The plumbing fixture that requires the most maintenance is?
The water closet
When cutting a hole for a fixture in a counter top you should?
Use a reciprocating saw with a sharp fine toothed blade
Where would you find the space required for a water closet?
Manufactures rough in books
The quantity of drinking water per day required by humans ?
2 liters
Cloud formation is the atmosphere is caused by?
Cool air condensation of water vapor
Ground water that naturally re appears on the earth surface may show up as?
Swamps, sloughs or springs
PH level of natural precipitation is commonly close to?
5.6 PH
PH level of 4 indicates that a substance is?
Acidic
Water is considered to be a universal solvent because?
More things dissolve in water that in any other solvent.
A gooseneck on a water service is installed to provide for?
Flexibility of the pipe as ground settling after backfill or moves from frost.
The corporation curb cock is placed on or near the property line for?
The utility employee does not have to trespass
What is the minimum size of water distribution piping to a service water heater serving more than two fixtures?
3/4”
What is the maximum length of connector used with a 3/8” supply pipe?
750mm
A water test for water distribution system may be done with?
Potable water only
The shut off valve placed at the entry point of a 3/4” or 1” water service is allowed to be ?
A stop & drain valve
Minimum pay rates for apprentices are laid out by law in?
Plumber trade regulations
A pipe that collects both human waste and other types of waste is known as a?
Soil pipe
True or False: A stack-vented group is also known as a single story wet vent?
False
The discharge from an air conditioner would be known as?
Clear water waste
The pipe that connects a fixture trap to another part of the drainage system is known as?
Fixture Drain
True or False:A device used for the storage of food must have its drain directly connected to the drainage system?
False
True or False: A vent pipe that is an extension of a soil stack is known as an individual vent?
False
True or False: Nominally vertical means an angle of not more than 45 degrees with the vertical?
True
Minimum standards for plumbing systems installed in the province of Alberta are found in the?
National plumbing code of Canada
A water closet trap will be tied into the stack by the use of a?
Sanitary tee
The unobstructed vertical distance thru air between a soil or waste pipe and the flood level rim of the fixture into which it discharges?
Air break
The minimum size of a Laundry Tub Trap arm?
1-1/2”
Minimum size of a water closed trap arm?
3”
Changes of direction or elevation in water distribution networks are protected fro disconnection of fittings by?
Thrust blocks & anchors
