Book 29 Ch 3 Water Utilities Flashcards
Although water covers about ____ of the earth’s surface, it is still necessary to deliver water to residential, commercial, and industrial customers to sustain the common necessities of life
2/3
_________ systems use a source of water (such as lakes and reservoirs) that is at a higher elevation than a municipality
Gravity
GRAVITY SYSTEMS - As an example, a height of ____ feet will create a pressure of ___ psi
100
43
The City of Los Angeles uses a combination system to supply an average of ____ million gallons of water per day to __ million people
600
4
Water is supplied to Los Angeles City from the following sources:
___% from two aqueducts from the Sierra Nevada
75
Water is supplied to Los Angeles City from the following sources:
___% from wells within the San Fernando Valley
15
Water is supplied to Los Angeles City from the following sources:
___% from the Metropolitan Water District (MWD) which supplies water from the Colorado River and State Water Project (Sacramento and Feather Rivers).
10
________ lines carry water from a primary source (reservoirs, pumps, etc.) to mains within a distribution system
Trunk
Trunk lines can vary from ___ inches to ___ feet in size, and are constructed from iron or concrete
36
10
Mains normally run beneath a street and parallel to a curb, can vary from __ to ___ inches in size, and are constructed from iron pipe
2
72
Service lines run between a main and a water meter, can vary from __ inch to ___ inches, and are constructed from iron, copper, or galvanized pipe
½
12
Two types of shut-off valves are commonly utilized:
1. ____________ valves
2. ____________ valves
- Non-Indicating
- Indicating
Non-Indicating Valves - When the valve is closed, the valve-nut on top of the valve is ______________ to the valve
Perpendicular
A gate valve is a non-rising stem valve that has a ________ valve-nut attachment at the top of the valve stem
Square
Indicating Type Valve - These valves indicate an open or closed position and are characterized by ______ valves and _____
OS&Y
PIV
Water meters are used to calculate water usage and check valves are utilized to allow the flow of water in __ direction only
1
Water Meter is used to calculate water usage for a _________ water service, vary in size from ___ to ___ inches (inlet-outlet size).
Domestic
½ to 10
Compound Meter is used to calculate water usage for domestic water services that can use low and high water flows, __ inches or larger and are normally found directly adjacent to
shut-off valves
4
Detector Check Valve with By-Pass Meter. Used to supply water for a closed fire protection system, Detector check valves can vary in size from __ to ___-inches
2 to 10
Combination Water Service - A domestic water meter and detector check valve providing __________ water services
Separate
PRESSURE REDUCING VALVES - normally used in domestic services to reduce high water pressures to an acceptable level inside a structure (i.e., dwellings commonly use ___ to ___ psi)
40 to 80
SINGLE FAMILY DWELLINGS - 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
½ to 2
SINGLE FAMILY DWELLINGS - Water service for a domestic sprinkler system will normally be a __ inch detector check valve that is located in a separate vault
2
HOTELS - Domestic water and fire protection services are provided by a combination water service that provides domestic water with a __ to __ inch water meter and water for fire protection with a __ to __ inch detector check valve
4 to 6
4 to 8
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
1 to 3
1 to 3
APARTMENTS - Water service for fire protection will vary between __ to __ inches
2 to 4
COMMERCIALS - As an example, a large warehouse with a small office area and large storage area can have a large (__ to ___ inch) water service for fire protection and a small (__ to __ inch) water service for a domestic water system
4 to 10
1 to 2
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
4 to 10
4 to 12
Automatic Wet Pipe System. The pipes in this system are filled with ________ at all times.
Water
Automatic Dry Pipe System - The pipes are filled with compressed _____
Air
Non-Automatic System. Pipes are maintained dry. To charge this system with water, it is necessary for fire department apparatus to ______ into the fire department connection to supply water to activated heads
Pump
Deluge System - Sprinklers may be open or closed and are supplied with water by a _______ actuated valve
Heat
Dry Standpipe - Dry standpipes consist of a siamese connection, piping, and ____ inch outlets on each floor (stairway and/or fire escape balcony) and roof
2½
Wet Standpipe - Designed for occupant use and consists of ____’ of ____” unlined singled jacketed hose with a ___” straight tip with no shut-off
100
1½
½
When closing a ball, cone, or gate valves that are __ inches or larger, it may be necessary to exercise a valve to completely eliminate the flow of water as valves can become encrusted with rust and scale. strike the threaded shaft with a hammer
3
SHEARED HYDRANT - __ inch diameter cap (usually painted blue) covers access to the gate valve
6
SHEARED HYDRANT - OPERATION - Turn in a ____________ direction to close valve (your initial attempt should begin with a ___________ rotation)
Clockwise
Clockwise
SHEARED HYDRANT - fire hydrant gate valves may require ___ to ___ full turns to complete a shutdown
18 to 26
SHEARED HYDRANT - 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
98
SHEARED HYDRANT - Always _______ the number of full turns when closing fire hydrant gate valves
Count
When notifying OCDS of a sheared off fire hydrant, include the following:
1. Fire hydrant _________
2. State if fire hydrant has been ________
3. The ________ of valves operated
- Location
- Shut-off
- Number
Supply systems are _________ or ______ or a combination of both
Gravity
Pump
A commercial occupancy with multiple occupancies such as mini-malls are referred to __ ________.
A battery
Some gate valve locations are indicated by ________ etched on the adjacent curb
Arrows
