Book 29 Ch 3 Water Utilities

Question 1

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

Answer 1

2/3

Question 2

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

Answer 2

Gravity

Question 3

GRAVITY SYSTEMS - As an example, a height of ____ feet will create a pressure of ___ psi

Answer 3

100
43

Question 4

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

Answer 4

600
4

Question 5

Water is supplied to Los Angeles City from the following sources:
___% from two aqueducts from the Sierra Nevada

Answer 5

75

Question 6

Water is supplied to Los Angeles City from the following sources:
___% from wells within the San Fernando Valley

Answer 6

15

Question 7

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).

Answer 7

10

Question 8

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

Answer 8

Trunk

Question 9

Trunk lines can vary from ___ inches to ___ feet in size, and are constructed from iron or concrete

Answer 9

36
10

Question 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

Answer 10

2
72

Question 11

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

Answer 11

½
12

Question 12

Two types of shut-off valves are commonly utilized:
1. ____________ valves
2. ____________ valves

Answer 12

1. Non-Indicating
2. Indicating

Question 13

Non-Indicating Valves - When the valve is closed, the valve-nut on top of the valve is ______________ to the valve

Answer 13

Perpendicular

Question 14

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

Answer 14

Square

Question 15

Indicating Type Valve - These valves indicate an open or closed position and are characterized by ______ valves and _____

Answer 15

OS&Y
PIV

Question 16

Water meters are used to calculate water usage and check valves are utilized to allow the flow of water in __ direction only

Answer 16

1

Question 17

Water Meter is used to calculate water usage for a _________ water service, vary in size from ___ to ___ inches (inlet-outlet size).

Answer 17

Domestic
½ to 10

Question 18

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

Answer 18

4

Question 19

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

Answer 19

2 to 10

Question 20

Combination Water Service - A domestic water meter and detector check valve providing __________ water services

Answer 20

Separate

Question 21

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)

Answer 21

40 to 80

Question 22

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

Answer 22

½ to 2

Question 23

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

Answer 23

2

Question 24

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

Answer 24

4 to 6
4 to 8

Question 25

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

Answer 25

1 to 3 1 to 3

Question 26

APARTMENTS - Water service for fire protection will vary between __ to __ inches

Answer 26

2 to 4

Question 27

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

Answer 27

4 to 10 1 to 2

Question 28

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 28

4 to 10 4 to 12

Question 29

Automatic Wet Pipe System. The pipes in this system are filled with ________ at all times.

Answer 29

Water

Question 30

Automatic Dry Pipe System - The pipes are filled with compressed _____

Answer 30

Air

Question 31

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

Answer 31

Pump

Question 32

Deluge System - Sprinklers may be open or closed and are supplied with water by a _______ actuated valve

Answer 32

Heat

Question 33

Dry Standpipe - Dry standpipes consist of a siamese connection, piping, and ____ inch outlets on each floor (stairway and/or fire escape balcony) and roof

Answer 33

2½

Question 34

Wet Standpipe - Designed for occupant use and consists of ____' of ____” unlined singled jacketed hose with a ___” straight tip with no shut-off

Answer 34

100 1½ ½

Question 35

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

Answer 35

3

Question 36

SHEARED HYDRANT - __ inch diameter cap (usually painted blue) covers access to the gate valve

Answer 36

6

Question 37

SHEARED HYDRANT - OPERATION - Turn in a ____________ direction to close valve (your initial attempt should begin with a ___________ rotation)

Answer 37

Clockwise Clockwise

Question 38

SHEARED HYDRANT - fire hydrant gate valves may require ___ to ___ full turns to complete a shutdown

Answer 38

18 to 26

Question 39

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

Answer 39

98

Question 40

SHEARED HYDRANT - Always _______ the number of full turns when closing fire hydrant gate valves

Answer 40

Count

Question 41

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

Answer 41

1. Location 2. Shut-off 3. Number

Question 42

Supply systems are _________ or ______ or a combination of both

Answer 42

Gravity Pump

Question 43

A commercial occupancy with multiple occupancies such as mini-malls are referred to __ ________.

Answer 43

A battery

Question 44

Some gate valve locations are indicated by ________ etched on the adjacent curb

Answer 44

Arrows