The Last 111 Test: DWV Systems (Part 2)

Question 1

DWV branches are connected to the main DWV system using…

Answer 1

Sanitary Fittings

Question 2

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

Answer 2

Double Trapping

Question 3

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

Answer 3

Sludge

Question 4

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

Answer 4

Building Sewer

Question 5

What allows pipes made from different materials to be connected?

Answer 5

Adapters

Question 6

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

Answer 6

Double 1/4 Bend

Question 7

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

Answer 7

Short Sweep 1/4 Bends

Question 8

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

Answer 8

Sanitary Increaser

Question 9

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

Answer 9

Vent Tee

Question 10

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

Answer 10

Vent Ell

Question 11

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?

Answer 11

Interceptor

Question 12

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

Answer 12

Sanitary Wye

Question 13

What fittings serve as locations to conduct leakage tests?

Answer 13

Test Tees

Question 14

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

Answer 14

Pipe Scale

Question 15

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

Answer 15

Sanitary Combination

Question 16

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

Answer 16

Elevation

Question 17

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

Answer 17

Slope

Question 18

What is another name for slope?

Answer 18

Percent of Grade

Question 19

What strains the wastewater before it enters the drainage piping?

Answer 19

Fixture Drains

Question 20

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

Answer 20

Run

Question 21

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

Answer 21

Backpressure/Backflow

Question 22

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

Answer 22

Cleanout

Question 23

What allows smaller lines to be connected to a bend?

Answer 23

Side Inlet

Question 24

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

Answer 24

Branch Interval

Question 25

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

Answer 25

Siphonage

Question 26

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

Answer 26

Long Sweep

Question 27

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

Answer 27

Stack

Question 28

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

Answer 28

P-Trap

Question 29

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

Answer 29

DWV System

Question 30

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

Answer 30

S Trap

Question 31

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

Answer 31

Capillary Attraction

Question 32

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

Answer 32

Evaporation

Question 33

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

Answer 33

Drainage Fittings

Question 34

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

Answer 34

Sanitary Combinations

Question 35

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

Answer 35

Inverted Wyes

Question 36

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

Answer 36

Hydronic Gradient

Question 37

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

Answer 37

Velocity

Question 38

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

Answer 38

One Pipe Diameter