Ifsta 5Th Edition Chapter 12 Water Supply Ff 2

Front 1

fire departments work with

Back 1

their local water dep in planning fire protection coverage

Front 2

all water systems are composed of the following basic components

Back 2

sources of water supply
means of moving water
water treatment facilities
water storage and distribution systems

Front 3

primary water supply can be obtained from

Back 3

surface water, ground water or both

Front 4

examples of surface supply

Back 4

rivers aqueducts lakes and reservoirs

Front 5

examples of ground water supply

Back 5

wells drilled into underground aquifers and a few from water producing springs

Front 6

community needs can be calculated by

Back 6

history of consumption and estimates of anticipated needs

Front 7

means of moving water

Back 7

direct pumping systems
gravity systems
combination systems

Front 8

direct pumping systems are mostly found in

Back 8

agricultural and industrial settings

Front 9

direct pumping works by

Back 9

one or more pumps draw water from the primary source and transport it to the point of use

Front 10

main disadvantageous of direct pumping

Back 10

their total dependence on pumps and on electricity to run the pumps

Front 11

direct pumping system

Back 11

water supply system supplied directly by a system supplied directly by a system of pumps rather than elevated storage tanks.

Front 12

gravity system uses

Back 12

a primary water source located at a higher elevation than the distribution system and delivers water to the system with out the use of pumps.

Front 13

gravity systems are located

Back 13

100 ft higher than the highest point in the water distribution

Front 14

true examples of gravity systems are

Back 14

those that supplied from an alpine lake or a mountain reservoir that supplies water to consumers below

Front 15

combination systems

Back 15

use combination of the direct pumping and gravity systems

Front 16

underground cisterns

Back 16

tanks used to store rainwater

Front 17

drinking water is most often treated by

Back 17

filtering out particulates and adding chlorine to kill bacteria and other organis

Front 18

fluoride

Back 18

added for tooth decay

Front 19

potential problems for water treatment facilities

Back 19

mechanical breakdown
natural disaster
loss of power supply
fire could disable the facility's pumps
releases of liquid chlorine that releases highly toxic and corrosive substance can have serious health consequence for anyone breathing the fumes

Front 20

ability of water system to deliver a sufficient quantity of water at adequate pressure depends on

Back 20

the capacity and elevation of the storage tanks and the condition and carrying capacity of the systems network of underground pipes called mains

Front 21

dead end hydrant

Back 21

receives water from only one way
and has limited water supply

Front 22

less pressure loss in fire hydrants that

Back 22

are supplied from two or more directions

Front 23

hydrants that receive water from more than one direction are said to have

Back 23

circulating feed or a looped line

Front 24

distribution system that provides circulating feed from all directions

Back 24

grid system

Front 25

grid system consist of these components

Back 25

primary feeders
secondary feeders
distributors

Front 26

large mains with relatively widespread spacing that convey large quantities of water to various points in the system for distribution to secondary feeders and smaller mains

Back 26

primary feeders-

Front 27

network of intermediate swized mains that subdivided the grid within the various loops of primary feeders and supply the distributors

Back 27

secondary feeders

Front 28

grid arrangement of smaller mains serving individual fire hydrants and blocks of consumers

Back 28

distributors

Front 29

fire hydrant that receives water from two or more directions

Back 29

circulating feed

Front 30

water main arranged in a complete circuit so that water will be supplied to a given point from more than one direction.

Back 30

loop system

Front 31

to ensure sufficient water supply

Back 31

twp or more primary feeders should run from the source of supply to high risk and industrial district by separate routes

Front 32

american water works associations recommends the size of fire hydrant supply mains to be

Back 32

at least 6 in in diameter in residential area and closely gridded by 8 inch cross connecting mains at intervals of not more than 600 ft
in business and industrial the minimum recommended size is 8 inch main and with cross connecting every 600 ft

Front 33

function of water valve in water distribution is to

Back 33

provide a means for controlling the flow of water through the distribution piping

Front 34

valves should be checked

Back 34

once a year

Front 35

most important factor in the operation of a water supply system

Back 35

is the water departments ability to promptly open valves when increase flow is needed during an emergency or to close valves in a breakdown

Front 36

valves are divided into two groups

Back 36

indicating closed
non indicating

Front 37

will show the position of the gate or valve seat open, closed, or partially

Back 37

indicating valve

Front 38

outside stem and yoke valve a type of control valve for a sprinkler system in which the position of the center screw indicates whether the valve is open or closed
its open when threaded portion of the stem is visible and invisible when the valve is closed

Back 38

os&y valve

Front 39

type of valve used to control underground water mains that provides a visual means for indicating open or shut position found on the supply main of installed fire protection systems
has open and shut on it

Back 39

post indicator valve (piv)

Front 40

the non rising stem type; as the valve nut is turned by the valve key the gate either rises or lowers to control the water flow

Back 40

gate valve

Front 41

__________should be marked with a number indicating the number of turns necessary to completely open or close the valce

Back 41

gate valves

Front 42

tight closing and they usually have a rubber or a rubber composition seat that is bonded to the valve body. valve rotates at a 90 deg angle

Back 42

butterfly valve