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Plumbing > The Last 111 Test: DWV Systems (Part 2) > Flashcards

The Last 111 Test: DWV Systems (Part 2) Flashcards

1
Q

DWV branches are connected to the main DWV system using…

A

Sanitary Fittings

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2
Q

What describes the attachment of one trap to another trap in a water closet?

A

Double Trapping

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3
Q

What is the substance that settles on the bottom of holding tanks called?

A

Sludge

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4
Q

The underground drain pipe that carries waste from the building to the public sewer is called a(n)…

A

Building Sewer

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5
Q

What allows pipes made from different materials to be connected?

A

Adapters

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6
Q

The flow from two opposite runs into a single run of pipe are collected and combined in a(n)…

A

Double 1/4 Bend

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7
Q

Bend fittings with a short radius that are used at the base of a DWV stack are called…

A

Short Sweep 1/4 Bends

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8
Q

What fitting, in cold climates, can prevent vent openings from closing as a result of frozen condensation in pipes?

A

Sanitary Increaser

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9
Q

What fitting may not be used in drainage systems because their design can cause waste to collect in the fitting?

A

Vent Tee

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10
Q

What fitting has a sharp turning radius that severely restrict the flow of materials, making their use allowable only in vent lines?

A

Vent Ell

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11
Q

What is used to keep undesirable or hazardous materials from entering a building drainage system, a public or private sewer, or sewage treatment plant or process?

A

Interceptor

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12
Q

Vertical branch lines that intersect with horizontal branch lines must be joined at an angle with a(n)…

A

Sanitary Wye

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13
Q

What fittings serve as locations to conduct leakage tests?

A

Test Tees

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14
Q

What collects on fittings, especially on iron or steel, as a result of metal corrosion?

A

Pipe Scale

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15
Q

Horizontal branch lines that intersect with other horizontal branch lines at a 90 degree angle are connected using a(n)…

A

Sanitary Combination

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16
Q

What is one of the four factors that must be considered when determining the intervals for manholes?

A

Elevation

17
Q

What works with gravity to move solid and liquid waste through DWV systems?

A

Slope

18
Q

What is another name for slope?

A

Percent of Grade

19
Q

What strains the wastewater before it enters the drainage piping?

A

Fixture Drains

20
Q

What is one or more lengths of pipe that continue in a straight line called?

A

Run

21
Q

The pressure inside the DWV piping that is greater than atmospheric pressure is called…

A

Backpressure/Backflow

22
Q

An access point to all parts of the drainage system for the removal of blockages is called a(n)

A

Cleanout

23
Q

What allows smaller lines to be connected to a bend?

A

Side Inlet

24
Q

What is the section of stack that connects branch pipes to the main DWV stack called?

A

Branch Interval

25
Q

An imbalance of in pressure between the inside and outside DWV piping can cause…

A

Siphonage

26
Q

What does code generally require the use of at the base of stacks?

A

Long Sweep

27
Q

What is the general term for most vertical line including offsets offsets of soil, waste, vent, or inside conductor piping?

A

Stack

28
Q

A one or two-piece trap with a union nut is called a(n)

A

P-Trap

29
Q

A circuit of piping inside a building is call a(n)

A

DWV System

30
Q

What has been replaced by the P Trap due to improvements in plumbing.

A

S Trap

31
Q

Porous material caught in a trap can cause a seal to be broken by…

A

Capillary Attraction

32
Q

The infrequent use of a trap can cause what of the seal?

A

Evaporation

33
Q

What are devices used to connect pipe in DWV systems called?

A

Drainage Fittings

34
Q

The upper ends of vents are joined to the top of soil and waste stack by…

A

Sanitary Combinations

35
Q

Connecters that may be used in place of vent branches are called…

A

Inverted Wyes

36
Q

The level line in which water tends to flow through the trap is the…

A

Hydronic Gradient

37
Q

What is the speed at which waste flows through pipes called?

A

Velocity

38
Q

The fall in a horizontal pipe from crown weir to vent must not exceed…

A

One Pipe Diameter

Plumbing (13 decks)

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