OPSC Chapter 11 Storm Drainage

Question 1

Outlets in 24" catch basins shall be at least _" and not larger than _"

Accepted Answer

3" and 6"

Question 2

Storm water shall not be drained into sewers intended for sanitary drainage.

Accepted Answer

True

Question 3

_ shall have paved areas sloped with 6" curbs to direct water to gratings or sumps

Accepted Answer

Public filling stations&Motor vehicle washing establishments

Question 4

Open subsurface areas such as a entrance to basement or cellar shall be provided with a

Accepted Answer

2" minimum drain

Question 5

The discharge of a secondary separate piping system shall discharge _ grade, in _ location.

Accepted Answer

above grade, in observable location

Question 6

A trap is required for leaders or conductors that are connected to a dedicated storm sewer line

Accepted Answer

false

Question 7

Clean outs for rain drains shall be installed per what section of this code

Accepted Answer

707.0

Question 8

Conductors are installed __ in buildings & shall be in accordance with standards referenced in

Accepted Answer

inside a building 701.2 for above ground drain, waste, vent

Question 9

Tracer wire for storm water shall be what minimum gauge and what color?

Accepted Answer

18 gauge, green

Question 10

If the gravity drainage line for an ground water pump is in the horizontal the gate valve shall

Accepted Answer

be on the discharge side of the swing check/backwater valve

Question 11

Subsoil, foundation, and absorption drains that are subject to reverse flow shall be equipped

Accepted Answer

an accessible backwater valve

Question 12

Building sewers located _ or more away from the building shall be of material listed in 1701.1

Accepted Answer

2'

Question 13

In concern to rain drains, conductors of stainless steel 304 pipe and fitting shall

Accepted Answer

not be installed underground & not less than 6" above ground

Question 14

Dimension and construction details such as wall thickness for catch basins can be found in

Accepted Answer

Section 1101.11

Question 15

Raindrains shall be sized on a storm of _ minutes duration & _ year period. Refer in Appendix _

Accepted Answer

60 minutes, 100 years, Appendix D

Question 16

Raindrain systems shall be provided with an expansion or approved swing joint where connections

Accepted Answer

between inside conductors and roof, deck, overflows drains

Question 17

Subsoil drains under or around buildings shall be used only to collect and drain ground water.

Accepted Answer

true

Question 18

Constructing a dry well can be fount in the OPSC in sections 1101.6.3.1 through 1101.6.3.4

Accepted Answer

true

Question 19

If a scupper is used as a secondary roof drain the opening shall not be less than _ high and

Accepted Answer

4" have a width equal to the Circ of the roof drain required

Question 20

Rainwater sumps serving "public use" occupancy building shall be provided with

Accepted Answer

a double pump arrangement

Question 21

Roof drain strainers for sun decks parking decks, and similar areas are permitted to have

Accepted Answer

Flat surface type strainers

Question 22

Tracer wire for rain drains shall run the full length of the installed pipe

Accepted Answer

one end above finished grade and be clearly marked

Question 23

Secondary Roof drains shall connect to a piping system by what method(s)?

Accepted Answer

Separate and combined piping systems are both permitted

Question 24

Gastight and watertight reciving tanks or sumps shall be vented by pipe not less than _ in size

Accepted Answer

2"

Question 25

Dry wells are an adopted part of the Oregon plumbing specialty code.

Accepted Answer

False

Question 26

What are the method(s) for secondary emergency roof drainage

Accepted Answer

Secondary roof drains, roof scuppers and open-side roof

Question 27

Roof drains shall have _ strainers.

Accepted Answer

Domed

Question 28

The size of building storm drains or building storm sewers or their horizontal branches shall

Accepted Answer

be based upon the max project roof or paved area

Question 29

Leaders and storm drains, where connected to a combined sewer shall be

Accepted Answer

trapped

Question 30

The Building official shall be permitted to require the removal of cleanout plugs for testing

Accepted Answer

true

Question 31

_ shall have an inside dims of not less than 24" & extend not less than 24" below the waterline

Accepted Answer

catch basins

Question 32

Except _ the piping of storm drain systems shall be tested by water or air.

Accepted Answer

all of these types are exceptions for testing

Question 33

The discharge pipe from a pump or ejector to lift groundwater shall be equipped with

Accepted Answer

a swing check or back water valve and a gate valve

Question 34

Secondary roof drains may be provided.

Accepted Answer

False

Question 35

Santees & quarter bends may be used for interior storm drainage in lieu of long turn fittings

Accepted Answer

true

Question 36

Fittings for exterior storm drainage between a trap and a connection to a combined sewer

Accepted Answer

shall be as required for drainage piping in section 706.0

Question 37

Expansion joints or sleeves shall be provided where warranted by temp variations or conditions

Accepted Answer

true

Question 38

The secondary roof drains shall be located not less than _ above the roof surface.

Accepted Answer

2"

Question 39

A conductor pipe may be used as a sanitary drain or vent and vice versa.

Accepted Answer

false

Question 40

Grates for catch basins shall be designed to prevent bicycle and wheelchair tires from entering

Accepted Answer

true

Question 41

Leaders are installed __ in buildings & shall be in accordance with standards referenced in

Accepted Answer

outside a building 701.2 for above ground drain, waste, vent

OPSC Chapter 11 Storm Drainage

Questions 41

OPSC Chapter 11 Storm Drainage

Questions 41