Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Books > Book 29: Chapter 5 Water Utilities > Flashcards

Book 29: Chapter 5 Water Utilities Flashcards

1
Q

The _____ ______ supply water to the distribution systems.

A

The supply systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

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

A

Gravity or pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

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

A

Gravity system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

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).

A

Elevation

43psi

.433

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

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

A

Pump system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

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

A

Combination system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

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

A

600 million gallons

4 million people

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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).

A

75%
Sierra Nevada

15%
San Fernando valley

10%colorado river

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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.

A

Pipes, valves, check valves, and water meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

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

A

Trunk lines, mains, service and customer lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

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

A

Trunk lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

36 inches to 10 feet

Iron or concrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

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

A

Mains
2-72 inches

Iron pipe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

Loops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

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

A

Service and customer lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

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

A

Main
Water meter

1/2 inch to 12 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

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

A

Water meter
Structure

1/2 inch to 12 inches

Plastic pipe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

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.

A

Water metering device

Shut-off valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

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.

A

Shut-off valve
Output

Structure

Plumbing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

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 ______ _____.

A

Plumbing code requirements

Consumption needs.

Domestic water

Single service

Separate service

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

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

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

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.

A

Meter box, vault, manhole

Blue paint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

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

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Two types of shut-off valves are commonly utilized:

A

Non-indicating valves

Indicating valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

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

A

Non-indicating valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

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.

A

Ball or cone

Perpendicular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

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

A

Gate valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

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

A

Indicating type valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

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

A

Water meter

Check valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

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

A

1/2’’ to 10’’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

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

A

Compound meter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

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.

A

Check valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

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

A

4 inches

Shut-off valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

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

A

Fire protection

35
Q

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.

A

Parallel

2-10’’

36
Q

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

A

Combination water service

37
Q

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

A

Vault

Separated

38
Q

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).

A

Pressure reducing valves

39
Q

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

A

Fire protection services

40
Q

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.

A

Piping, water meter, shut-off valve, pressure reducing

Piping, detector check, shuf-off valves

41
Q

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).

A

Below grade

Above or below

42
Q

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.

A

1/2 to 2 inch

One or both

43
Q

Single family dwelling:

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

A

Meter
Vertical riser
Basement

44
Q

Single family dwelling:

A ____ ____ valve can be located near the meter or structure.

A

Pressure reducing valve

45
Q

Single family dwelling

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

A

2’’

Vault

46
Q

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.

A

Combination water service

4-6 inch
4-8 inch

47
Q

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 ______.

A

Water meter
Detector check valves

Structure

48
Q

Hotels:

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

A

Above ground

49
Q

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.

A

1 to 3 inch
1 to 3 inch
Water meter

50
Q

Apartments

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

A

Exterior or interior

51
Q

Apartments

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

A

Pressure reducing

2 to 4 inches

52
Q

Apartments

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

A

Ground vaults

53
Q

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 _____.

A

3 inch

2inch
3inch
Basement

54
Q

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 _____).

A

Battery

55
Q

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____ _____

A

1 to 2 inch
2 to 4 inch

Water meter

56
Q

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.

A

4 to 8 inch

4 to 10 inch

57
Q

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 ______.

A

Separate vaults

Single meter

Detector check valves
Structure

58
Q

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.

A

4 to 10 inch

4 to 12 inch

59
Q

Fire protection is provided by ______ systems and ______ systems.

A

Sprinkler systems and standpipe systems

60
Q

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

A

Automatic wet pipe

61
Q

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.

A

Automatic dry pipe

62
Q

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.

A

Non-automatic system

63
Q

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

A

Deluge system

64
Q

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.

A

Dry standpipe

65
Q

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

A

Wet standpipe

66
Q

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

A

Life support machine in area

Shut the gate system divide

67
Q

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 _____.

A

Exercise
Rust and scale

Hammer

68
Q

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

A

Nut

69
Q

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

A

Fire service personnel

70
Q

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.

A

Water meter

90 degrees

71
Q

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.

A

Both sides

Vaults

72
Q

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.

A

4 inch or larger

73
Q

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.

A

Slot head screwdriver

74
Q

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.

A

Water heater or boiler

Gas or electricity

75
Q

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.

A

Sectional shut off or zone values

76
Q

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 “____.”

A

Padlocks or chains clockwise

open or shut

77
Q

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

A

Clockwise

visible

78
Q

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.

A

6’’

Blue

79
Q

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)

A

18 - 26

80
Q

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.

A

98%

81
Q

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

A

Vibration

82
Q

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

A

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

83
Q

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

A

Dwp

Books (46 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions