Book 29: Chapter 5 Water Utilities

Question 1

The _____ ______ supply water to the distribution systems.

Answer 1

The supply systems

Question 2

Supply systems are ____ or ___ or a combination of both.

Answer 2

Gravity or pump

Question 3

use a source of water (such as lakes and reservoirs) that is at a higher elevation than a municipality.

Answer 3

Gravity system

Question 4

Gravity systems:

The pressure of the water delivered into a distribution system is determined by the ______ of the source above the area of usage. As an example, a height of 100 feet will create a pressure of __ psi (___ psi per foot of elevation X 100 feet = 43 psi).

Answer 4

Elevation

43psi

.433

Question 5

When a source of water is below or at the same elevation as a municipality, or cannot naturally provide sufficient pressure through adequate elevation This is a

Answer 5

Pump system

Question 6

Water is initially supplied into a distribution system by a combination of pumps and/or gravity. This is a

Answer 6

Combination system

Question 7

The City of Los Angeles uses a combination system to supply an average of ___ million gallons of water per day to __ million people.

Answer 7

600 million gallons

4 million people

Question 8

Water is supplied to Los Angeles City from the following sources:

__% from two aqueducts from the _____ ____.

__% from wells within the ___ ______ Valley.

__% from the Metropolitan Water District (MWD) which supplies water from the ____ River and State Water Project (Sacramento and Feather Rivers).

Answer 8

75%
Sierra Nevada

15%
San Fernando valley

10%colorado river

Question 9

Water is delivered throughout Los Angeles City by a distribution system of ___, _____, ____ valves, and ___ _____, and is normally cross connected at specific intervals to supply water to areas that can be affected by repairs, breakage, and other similar problems.

Answer 9

Pipes, valves, check valves, and water meters

Question 10

Pipelines within a distribution system can be classified as ____ lines, ____, ____ and _____ lines.

Answer 10

Trunk lines, mains, service and customer lines

Question 11

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

Answer 11

Trunk lines

Question 12

Trunk lines can vary from __ inches to __ feet in size, and are constructed from ____ or ____.

Answer 12

36 inches to 10 feet

Iron or concrete

Question 13

____normally run beneath a street and parallel to a curb, can vary from __ to ___ inches in size, and are constructed from ___ ___.

Answer 13

Mains
2-72 inches

Iron pipe

Question 14

Mains can be cross connected to form ____that allow shutting down a specific main within a distribution system for repairs, etc.

Answer 14

Loops

Question 15

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

Answer 15

Service and customer lines

Question 16

Service lines run between a ___ and a ____ ____, can vary from __ inch to __ inches, and are constructed from iron, copper, or galvanized pipe

Answer 16

Main
Water meter

1/2 inch to 12 inches

Question 17

Customer lines run between a ____ ____ and a ______, can vary from __ inch to __ inches, and are constructed from iron, copper, galvanized, or ____ ____.

Answer 17

Water meter
Structure

1/2 inch to 12 inches

Plastic pipe

Question 18

Water utility companies are normally responsible for maintenance and repair of a water distribution system, including:

____ _____ device.
___-____ ____ on either side of a water metering device.

Answer 18

Water metering device

Shut-off valves

Question 19

Building owners are normally responsible for maintenance and repair of:
Plumbing from the ___-___ valve (on the _____ side of a water metering device), and into a _____.

All ______ inside a structure.

Answer 19

Shut-off valve
Output

Structure

Plumbing

Question 20

The type and size of water service to a structure is determined by a combination of applicable ____ _____ requirements and water _______ needs that result in the following types of water service configurations:

______ water only.

Domestic water and water for fire protection through a ___ ____.
Domestic water and water for fire protection through ______ _____.

Answer 20

Plumbing code requirements

Consumption needs.

Domestic water

Single service

Separate service

Question 21

Water service systems are comprised of ____-___ valves, ___ ____ and ______ _____ valves, and _____ _____ valves.

Answer 21

Shut-off valves
Water meters
Detector check valves,
Pressure reducing valves

Question 22

A ____ box, _____, or _____ often has a centerpiece or lid with a hole that can be utilized to remove the cover. The centerpiece or lid normally identifies the type of utility with the word(s) “WATER,” “DWP,” “L.A. Water,” “LA DWP WATER,” or “CITY WATER METER,” and are often marked with ____ paint.

Answer 22

Meter box, vault, manhole

Blue paint

Question 23

provide a means for controlling the flow of water through service and customer lines.

Answer 23

Shut off valves (or service valves, curb valves, etc.)

Question 24

Two types of shut-off valves are commonly utilized:

Answer 24

Non-indicating valves

Indicating valves

Question 25

These valves do not indicate an open or closed position and are characterized by ball or cone valves and gate valves.

Answer 25

Non-indicating valves

Question 26

A ___ or ____ valve has a rectangular valve-nut attachment on the top of the valve. When the valve is closed, the valve-nut is ______ to the valve.

Answer 26

Ball or cone Perpendicular

Question 27

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

Answer 27

Gate valve

Question 28

These valves indicate an open or closed position and are characterized by outside stem and yoke (OS&Y) valves and post indicator valves (PIV).

Answer 28

Indicating type valve

Question 29

___ ____are used to calculate water usage and _____ valves are utilized to allow the flow of water in one direction only.

Answer 29

Water meter | Check valves

Question 30

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

Answer 30

1/2’’ to 10’’

Question 31

is used to calculate water usage for domestic water services that can use low and high water flows.

Answer 31

Compound meter

Question 32

During low water flows, a compound meter operates as a standard water meter. However, if high flows are necessary, a ____ ____ opens and allows the passage of large flows that are metered separately.

Answer 32

Check valve

Question 33

Compound meters are _ inches or larger and are normally found directly adjacent to ___-___ valves.

Answer 33

4 inches Shut-off valves

Question 34

Detector Check Valve with By-Pass Meter. Used to supply water for a closed ____ ______ system.

Answer 34

Fire protection

Question 35

Most detector check valves will use a small water meter in _____ with the check valve(s) to detect leaks and the unauthorized use of water. Detector check valves can vary in size from _ to __-inches.

Answer 35

Parallel | 2-10’’

Question 36

A domestic water meter and detector check valve providing separate water services.

Answer 36

Combination water service

Question 37

A water meter and check valve may be located in the same ____ or _____ in adjacent vaults.

Answer 37

Vault Separated

Question 38

are normally used in domestic services to reduce high water pressures to an acceptable level inside a structure (i.e., dwellings commonly use 40 to 80 psi).

Answer 38

Pressure reducing valves

Question 39

Pressure reducing valves are not normally utilized in ____ ______ services.

Answer 39

Fire protection services

Question 40

A typical domestic water service normally consists of ____, a ____ ____, ____-___ valve(s), a _____ _____ valve, and a typical fire protection service normally consists of _____, _____ _____ valves, and ____-____ valves.

Answer 40

Piping, water meter, shut-off valve, pressure reducing Piping, detector check, shuf-off valves

Question 41

In warm climates, water meters can be placed just ____ ____level, and pressure reducing valves, shut-off valves, and detector check valves can be located ____ or ____ grade level (i.e., L.A. City).

Answer 41

Below grade Above or below

Question 42

Single family dwelling Domestic water services will normally consist of a __ to __ inch single water meter with shut-off valve on ___ or ____ sides of a meter.

Answer 42

1/2 to 2 inch One or both

Question 43

Single family dwelling: A customer line runs underground from the ____ to a ____ ____that enters a structure on the exterior or in a _____

Answer 43

Meter Vertical riser Basement

Question 44

Single family dwelling: A ____ ____ valve can be located near the meter or structure.

Answer 44

Pressure reducing valve

Question 45

Single family dwelling Water service for a domestic sprinkler system will normally be a __ inch detector check valve that is located in a separate ____

Answer 45

2’’ | Vault

Question 46

HOTELS Domestic water and fire protection services are provided by a _____ _____ service that provides domestic water with a _ to _ inch water meter and water for fire protection with a _ to _ inch detector check valve.

Answer 46

Combination water service 4-6 inch 4-8 inch

Question 47

Hotels: Shut-off valves are normally adjacent to the ___ ____ and _____ _____ valves, and a post-indicator valve is normally present between the detector check valves and ______.

Answer 47

Water meter Detector check valves Structure

Question 48

Hotels: The water meter and detector check valves can be in the same vault, separate vaults, or ____ ____

Answer 48

Above ground

Question 49

APARTMENTS Domestic water service will normally consist of _ to _ inch customer lines and a single __ to _ inch _____ ____ with a shut-off valve on one or both sides of a meter.

Answer 49

1 to 3 inch 1 to 3 inch Water meter

Question 50

Apartments customer line runs underground from a water meter to a vertical riser that enters a structure on the ______ or _____.

Answer 50

Exterior or interior

Question 51

Apartments A _____ _____ valve can be located near the water meter or structure. Water service for fire protection will vary between __ to __ inches.

Answer 51

Pressure reducing 2 to 4 inches

Question 52

Apartments The water services for domestic water and fire protection are in separate below _____ ____ or located above ground.

Answer 52

Ground vaults

Question 53

Apartments A common alternative to a single 1 to 3 inch water meter is a __inch equivalent water service. This system consists of two _ inch water meters in adjacent vaults that are connected to a single _ inch customer line that enters a structure on the exterior or _____.

Answer 53

3 inch 2inch 3inch Basement

Question 54

A commercial occupancy with multiple occupancies (such as mini-malls), can be serviced with water for a domestic water service by a single water meter for an entire building or, by multiple, 1 to 2 inch water meters in separate vaults, which can supply each individual occupancy (referred to as a _____).

Answer 54

Battery

Question 55

Commercials _ to _ inch water meter for domestic water service, and _ to _ inch detector check valves for fire protection in separate vaults. Shut-off valves are normally adjacent to a____ _____

Answer 55

1 to 2 inch 2 to 4 inch Water meter

Question 56

Commercials Combination water service with a _ to _ inch water meter for domestic water service, and _ to _ inch detector check valves for fire protection in the same vault.

Answer 56

4 to 8 inch 4 to 10 inch

Question 57

Commercials: Shut-off valves are normally adjacent to water meters in ______vaults or a _____ _____ that serves an entire building. Water for fire protection can be provided by detector check valves in a separate vault, or in a common vault with a water meter that serves an entire building. Shut-off valves are normally adjacent to ______ ____ valves and a post indicator valve may be present between the detector check valves and ______.

Answer 57

Separate vaults Single meter Detector check valves Structure

Question 58

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 58

4 to 10 inch 4 to 12 inch

Question 59

Fire protection is provided by ______ systems and ______ systems.

Answer 59

Sprinkler systems and standpipe systems

Question 60

The pipes in this system are filled with water at all times. When a head is activated, water immediately flows from activated heads.

Answer 60

Automatic wet pipe

Question 61

The pipes are filled with compressed air. The pipes are filled with compressed air. When a head is activated, air is immediately released from activated heads.

Answer 61

Automatic dry pipe

Question 62

Pipes are maintained dry. To charge this system with water, it is necessary for fire department apparatus to pump into the fire department connection to supply water to activated heads.

Answer 62

Non-automatic system

Question 63

Sprinklers may be open or closed and are supplied with water by a heat actuated valve.

Answer 63

Deluge system

Question 64

consist of a siamese connection, piping, and 2½ inch outlets on each floor (stairway and/or fire escape balcony) and roof. Water is supplied to this system by fire department apparatus.

Answer 64

Dry standpipe

Question 65

Designed for occupant use and consists of 100' of 1½” unlined singled jacketed hose with a ½” straight tip with no shut-off.

Answer 65

Wet standpipe

Question 66

"_____ _____MACHINE IN AREA" or ____ _____ SYSTEM DIVIDE." DO NOT turn these valves off unless appropriate approval is obtained.

Answer 66

Life support machine in area | Shut the gate system divide

Question 67

When closing a ball, cone, or gate valves that are 3 inches or larger, it may be necessary to ______a valve to completely eliminate the flow of water as valves can become encrusted with ___ and ____. When a stubborn cone valve is encountered, slightly loosen the nut on the bottom of the valve (if accessible) and strike the threaded shaft with a _____.

Answer 67

Exercise Rust and scale Hammer

Question 68

Ball valves do not have a ____on the bottom of a valve, and cone valves do.

Answer 68

Nut

Question 69

Leaks in customer lines (between a water meter, detector check valve, and structure) are normally handled by ____ _____ personnel

Answer 69

Fire service personnel

Question 70

3/4 to 1 inch service: A shut-off valve (ball or cone valve) is normally located adjacent to a ____ ____ and may be located above ground or underground. If the valve is underground and not in a meter box, it may be necessary to dig down outside a meter box to access the valve. Turning these valves __ degrees will eliminate the flow of water.

Answer 70

Water meter 90 degrees

Question 71

1 to 3 inch equivalent service: A shut-off valve (ball or cone valve) is normally located on ___ ___ of a water meter. Remove both vault covers to access the meter valves. It is necessary to shut off a valve in both _____ to completely eliminate the flow of water past this service configuration.

Answer 71

Both sides Vaults

Question 72

Due to the size of these water services and the possibility of damage to building heating, cooling, and other similar systems, personnel should not close these valves unless absolutely necessary. Normally, the DWP should be requested to handle these systems.

Answer 72

4 inch or larger

Question 73

Leaks from commercial toilets can be eliminated by removing a cap over the relief valve and using a ___-____ _______- to turn the relief valve screw outward.

Answer 73

Slot head screwdriver

Question 74

Hot water leaks can normally be eliminated by shutting off the appropriate valve at a ____ ____ or _____However, remember to shut off the __ or ______ to the heater to prevent a possible rupture due to expanding water in the heater.

Answer 74

Water heater or boiler Gas or electricity

Question 75

Sprinklers can be controlled by using the appropriate sprinkler shut-off tool, then look for ____ shut-off or ____ ____ instead of shutting off the whole system.

Answer 75

Sectional shut off or zone values

Question 76

To operate a post-indicator valve remove any ______ or ____ securing the control valve. Turn valve in _____ direction to close the valve. The valve will visually indicate the position of the valve by an arrow or display which states “____” OR “____.”

Answer 76

Padlocks or chains clockwise | open or shut

Question 77

OS&Y valves are turned _____ (so the stem is not ____) to stop the flow of water.

Answer 77

Clockwise | visible

Question 78

The fire hydrant gate valve is normally found in direct line with the fire hydrant and perpendicular to the curb. A s___inch diameter cap (usually painted ____) covers access to the gate valve.

Answer 78

6’’ | Blue

Question 79

Two members applying moderate pressure to the gate key should be adequate when closing the valve (fire hydrant gate valves may require __ to __full turns to complete a shutdown)

Answer 79

18 - 26

Question 80

Although approximately __%of all fire hydrant gate valves close in a clockwise direction, a member must recognize those instances when a counterclockwise rotation is necessary to close the valve.

Answer 80

98%

Question 81

As the gate valve is operated, you will hear and feel the _____ of the valve as it closes.

Answer 81

Vibration

Question 82

When notifying OCDS of a sheared off fire hydrant, include the following:

Answer 82

Fire hydrant location. State if fire hydrant has been shut-off. The number of valves operated.

Question 83

OCDS will notify the ____ Water Operating Trouble Board and advise them of your actions. The DWP will then dispatch necessary resources to the location.

Answer 83

Dwp