Sanitary Drainage Systems

Question 1

True or False:

Vitrified clay pipe is approved for use aboveground.

Answer 1

False

Question 2

True or False:

Stainless steel drainage piping shall not be installed underground.

Answer 2

True

Question 3

Fill in the blank:

Where stainless steel piping is used for drainage, it shall be kept not less than ______ inches above ground.

Answer 3

6

Question 4

Cast Iron pipe is approved for use in which of the following drainage applications?

a. Underground DWV
b. Above Ground DWV
c. Building Sewer
d. All of the above

Answer 4

d. all of the above

Question 5

Stainless steel 304 pipe is approved for use in which of the following applications?

a. Underground DWV
b. Above Ground DWV
c. Building Sewer
d. All of the above

Answer 5

b. Above Ground DWV

Question 6

What is the minimum trap size for a bathtub?

Answer 6

1 1/2”

Question 7

What is the minimum trap size for a domestic kitchen sink?

Answer 7

1 1/2”

Question 8

Fill in the blank:

A private bathtub drain has a value of ______ Drainage Fixture Units (DFU).

Answer 8

2

Question 9

Fill in the blank:

A private drinking fountain drain has a value of ______ Drainage Fixture Units (DFU).

Answer 9

0.5

Question 10

Fill in the blank:

A private kitchen sink drain has a value of ______ Drainage Fixture Units (DFU).

Answer 10

2

Question 11

Fill in the blank:

A public commercial food waste disposer drain has a value of ______ Drainage Fixture Units (DFU).

Answer 11

3

Question 12

What is the minimum trap size for an indirect waste receptor that receives liquid waste from heavy demand commercial sinks or dishwashers?

Answer 12

2”

Question 13

What is the maximum drainage fixture unit value for a 3” trap and trap arm?

Answer 13

6 DFU

Question 14

What is the drainage fixture unit value for an intermittent flow of 8 GPM?

Answer 14

2 DFU

Question 15

What is the maximum number of drainage fixture units for a 4” vertical drainage pipe?

Answer 15

256

Question 16

What is the maximum vertical developed length in feet for a 3” horizontal drainage pipe?

Answer 16

212

Question 17

What are the maximum drainage fixture units that can be served by a 1 1/2” vent pipe?

Answer 17

8

Question 18

What is the maximum developed length for a 1 1/2” drainage vent pipe?

Answer 18

60 feet

Question 19

What is the maximum developed length for a 2” drainage vent pipe?

Answer 19

120 feet

Question 20

True or False:

A floor drain is required to be installed adjacent to a commercial sink.

Answer 20

True

Question 21

Fill in the blank:

Cast-Iron caulked joints shall be packed with oakum and filled with molten lead to a depth of not less than ______ in one continuous pour.

Answer 21

1 inches

Question 22

Which of the following is not an approved method for joining copper drainage pipes?

a. brazed joint
b. mechanical joint
c. soldered joint
d. caulked joint

Answer 22

d. caulked joint

Question 23

True or False:

Transition solvent cement joint is permitted to be used between ABS and PVC pipe at the building drain and building sewer connection.

Answer 23

True

Question 24

Which of the following bends are not listed as an approved fitting for creating a change of direction in drainage piping?

a. one-third bend
b. one-sixth bend
c. one-eighth bend
d. one-sixteenth bend

Answer 24

a. one-third bend

Question 25

What size cleanout is required for a 2" pipe?

Answer 25

1 1/2"

Question 26

# Fill in the blank: Cleanout plugs shall have a countersunk \_\_\_\_\_\_ slot.

Answer 26

rectangular

Question 27

Each cleanout shall be installed so that it opens to allow cleaning.

Answer 27

in the direction of flow

Question 28

What is the minimum clearance for a 2" cleanout?

Answer 28

18" x 18”

Question 29

# Fill in the blank: No under-floor cleanout shall be located exceeding \_\_\_\_\_\_ feet from an access door, trap door or crawl hole.

Answer 29

5

Question 30

# Fill in the blank: The required slope for drainage piping that is 4" and larger in diameter is \_\_\_\_\_\_ inch per foot.

Answer 30

1/8

Question 31

What is the minimum diameter drainage pipe for the discharge pipe from a sewage ejector pump serving a single dwelling unit?

Answer 31

2”

Question 32

# True or False: A gate or ball valve shall be located before the check valve on the discharge line from a sewage ejector.

Answer 32

False

Question 33

# Fill in the blank: The lowest inlet into a sewage ejector sump shall have a clearance of not less than \_\_\_\_\_\_ inch(es) from the highwater or "starting" level of the sump.

Answer 33

2

Question 34

# Fill in the blank: A covered sump shall have a vent that is not less than \_\_\_\_\_\_ inches in diameter.

Answer 34

1 1/2

Question 35

# True or False: Plastic pipes shall not be permitted to be tested with air.

Answer 35

True

Question 36

# Fill in the blank: When testing a drainage and vent system using air, the system shall hold pressure for a period of not less than \_\_\_\_\_\_ minutes.

Answer 36

15

Question 37

# Fill in the blank: The public sewer shall be considered as not being available where it is located more than \_\_\_\_\_\_ feet from a proposed building.

Answer 37

200

Question 38

# Fill in the blank: The building sewer shall begin \_\_\_\_\_\_ feet from the building.

Answer 38

2

Question 39

What is the pipe size for a building sewer that is carrying 625 drainage fixture units and has a slope of 1/8" per foot?

Answer 39

8”

Question 40

# Fill in the blank: A building sewer pipe that is 4" in diameter shall be installed at a uniform slope of not less than \_\_\_\_\_\_ inch per foot toward the point of disposal

Answer 40

1/8

Question 41

# Fill in the blank: The building sewer piping shall be laid on a firm bed and supported \_\_\_\_\_\_.

Answer 41

the entire length of the pipe

Question 42

# Fill in the blank: Each cleanout shall be installed so that it \_\_\_\_\_\_.

Answer 42

opens to allow cleaning in the direction of flow

Question 43

What is the minimum horizontal distance required that a building sewer should be away from a building or structure?

Answer 43

2 feet

Question 44

# Fill in the blank: Building sewers that are plastic DWV shall be tested by plugging the end and filling the building sewer with \_\_\_\_\_\_.

Answer 44

water

Question 45

What is the minimum trap size for a clinical sink?

Answer 45

3”