*Bk 29 Water Utilities

Question 0

What sizes can a trunk line be?

What are they normally constructed of?

Answer 0

1. 36” to 10ft in size (3 to 10ft)

2. Iron or concrete

Question 1

________ lines carry water from a primary source (reservoirs, pumps, etc.) to mains within a distribution system

Answer 1

Trunk

Question 2

______ lines normally run beneath a street and parallel to a curb

Answer 2

main

Question 3

Main lines can be what sizes?

What are they constructed of?

Answer 3

1. 2” to 72” (2” to 6ft)

2. Iron pipe

Question 4

Water is delivered to individual structures by a combination of ______ and ______ lines.

Answer 4

Service and customer

Question 5

_____ lines run between a main and a water meter

Answer 5

Service

Question 6

What sizes are service lines?

Answer 6

1/2” to 12”

Question 7

Service lines can be constructed of what?

Answer 7

Iron, copper or galvanized pipe

Question 8

_____ lines run between a water meter and a structure

Answer 8

Customer

Question 9

What sizes can a customer line be?

Answer 9

1/2” to 12”

Question 10

Customer lines can be constructed of what?

Answer 10

Iron, copper, galvanized or plastic pipe

Question 11

Who is in charge of maintenance for the water metering device and the shut-off valves on either side of a water metering device?

Answer 11

Water utility companies (dwp)

Question 12

Who is in charge of maintenance for the plumbing starting from the water meter shutoff valve to the structure?

Answer 12

Building owner

Question 13

Meter boxes and vaults often have a lid which is painted which color?

Answer 13

Blue

Question 14

What are the two types of water utility shut off valves?

Answer 14

Non indicating and indicating valves

Question 15

What are the two types of indicating valves?

Answer 15

1. Outside stem and yolk (OS&Y)

2. Post indicating valve (PIV)

Question 16

What kind of meter is used to calculate water usage for domestic water services that can use low and high water flows?

Answer 16

Compound

Question 17

_________ are normally used in domestic services to reduce high water pressures to an acceptable level inside a structure

Answer 17

Pressure reducing valves

Question 18

What water pressures (psi) are commonly found inside a dwelling?

Answer 18

40-80psi

Question 19

Multiple water meters used to supply individual occupancies in a commercial building is often referred to as a _______.

Answer 19

Battery

Question 20

A wet standpipe system is designed to be used by who?

Answer 20

The occupants

Question 21

Ball and cone valves can be identified by the lack or presence of a nut on the bottom of a valve. Which valve has the nut on the bottom?

Answer 21

Cone valve (ball valve does not)

Question 22

Leaks from commercial toilets can be eliminated by removing a cap over the relief valve and using a slot-head screwdriver to turn the relief valve screw inward or outward?

Answer 22

Outward

Question 23

For a hot water leak inside a structure, where should you look to shut off the appropriate valve?

Answer 23

Water heater or boiler

Question 24

What else must be shut off if you shut down a hot water line from a water heater?

Answer 24

Turn off gas/electricity.

Question 25

Instead of shutting down an entire sprinkler system, what is the name of the valve that can be used to shut down the needed area/floor?

Answer 25

Sectional shutoff or zone valve

Question 26

When an OS&Y valve is shutoff, is the stem visible or not visible?

Answer 26

Not visible

Question 27

What size is the hydrant gate valve cap? (Used for shutting down a hydrant)

Answer 27

6 inch diameter cap

Question 28

Fire hydrant gate valves may require how many full turns to complete a shutdown?

Answer 28

18-26

Question 29

Approx ____ % of all fire hydrant gate valves close in a clockwise direction.

Answer 29

98%

Question 30

Per Vol 2:

___% of hydrants will have the street shut off valve located within ___ feet of the hydrant.

Answer 30

80%

15 ft

Question 31

Per vol 2:

Some hydrant gate valve locations are indicated by ____ on the adjacent curb

Answer 31

Etched arrows

Question 32

Water utilities, non indicating shut off valves:

A gate valve is a non-rising stem valve that has a _____ valve-nut attachment at the top of the valve stem.

A ball or cone valve has a _____ valve-nut attachment on the top of the valve.

Answer 32

Square

Rectangular

Question 33

Water meters are normally directly adjacent to shut-off valves and vary in size from ____ to ____ inches (inlet-outlet size)

Answer 33

1/2 to 10”

Question 34

For a single family dwelling:

Domestic water services will normally consist of a ____ to ____ inch single water meter with shut-off valve on one or both sides of a meter

Answer 34

1/2 to 2”

Question 35

Apartments:

• Domestic water service will normally consist of ___ to ___ inch customer lines and a single ____ to ____ inch water meter with a shut-off valve on one or both sides of a meter.
• Water service for fire protection willvary between ___ to ___ inches.

Answer 35

• 1 to 3” and 1 to 3”

* 2 to 4”

Question 36

High rise:

Domestic water and fire protection service is provided by a combination water service that consists of a ___ to ___ inch water meter for domestic water and ____ to ____ inch detector check valves for fire protection in the same vault.

Answer 36

4 to 10”

4 to 12”

Question 37

Automatic Dry Pipe sprinkler System:

The pipes are filled with _______.

Answer 37

Compressed air

Question 38

What should you do if a shut-off valve has a sign that reads:

“LIFE SUPPORT MACHINE IN AREA” or “SHUT GATE SYSTEM DIVIDE.”

Answer 38

DO NOT turn these valves off unless appropriate approval is obtained.