Distribution 2

Front 1

The branch of science or engineering that deals with water or other fluids at rest in motion is know as?

Back 1

Hydraulics

Front 2

When backfilling, how deep should the "first" compacted layer be?

Back 2

To the center of the pipe

Front 3

Concrete thrust blocks are used for

Back 3

Keep joints from opening

Front 4

Temporary cloudiness in a freshly drawn sample of tap water may be caused by?

Back 4

Air

Front 5

Most pumps in a public water system are what type?

Back 5

Velocity

Front 6

From a sanitary standpoint, the pressure in a distribution system shouldn't be allowed to fall to zero because?

Back 6

Back siphonage may occur

Front 7

Two principal functions of distribution system storage tanks are?

Back 7

Equalize pressure demand and reserve capacity for peak demands

Front 8

Which of the following "methods" could detetmine presence of leaks in the distribution system?

Back 8

*High unaccounted for water *Detection equipment. *Pools of water at surface or surface leaks.

Front 9

Examples of three waterborne diseases are?

Back 9

*Typhoid fever,

*Infectious hepatitis

*Cholera

Front 10

Weep holes in a dry barrel fire hydrant are designed to allow for?

Back 10

Water to drain from hydrant barrel when not in use

Front 11

Which guage is used to determine the GPM flowing from a fire hydrant?

Back 11

Pitot guage

Front 12

The main operation valve in a dry barrel fire hydrant is located in the?

Back 12

Base

Front 13

According to the state of tennesssee, hydrants used for fire protection must be able to deliver?

Back 13

500 gpm at 20 psi

Front 14

The minimum diamater main allowed for hydrants used for the fire protection in the state of Tennessee is?

Back 14

6" inches

Front 15

What is the minimum distance for an air gap separation?

Back 15

1" inch

Front 16

What is the minimum required horizontal separations between a water line and a sewer line?

Back 16

10 feet

Hint 16

Horizontal is left to right, NOT up and down.

Front 17

When water mains break or leaks are repaired, disinfection is required?

Back 17

Only when the line is partially or completely dewatered.

Front 18

The test pressure during a hydrostatic test must be 150psi or?

Back 18

1.5 times the normal working orrssure, whichever is greater.

Front 19

The C-factor of a water pipe is the?

Back 19

Measurement of smoothness of a pipe

Front 20

Water quality parameters that might change in the distribution system include?

Back 20

*Aesthetic

*Bacteriological

*Chemical

Front 21

Head loss in a water distribution main depends on?

Back 21

*The velocity or rate of flow

*The diameter of the pipe

*The smoothness of the inside of the pipe

Front 22

In a traffic control work zone, the flagger must stand so that?

Back 22

*He is always facing on coming traffic

*he's less than 100 feet from the actual work site

*He isn't in the direct path of an approaching vehicle

Front 23

One pound per square inch pressure will support a column of water that is how high?

Back 23

2.31 feet

Front 24

Which one of the following types of meters has no moving parts?

Back 24

Venturi

Front 25

A wet tap is a connection made into a main that is full of water or under pressure, true or false?

Back 25

True

Front 26

A valve that joins a customers service line to a water main is calked a?

Back 26

Corporation stop

Front 27

Which of the following is designed for joining a service line to a water main?

Back 27

Ball valve

Front 28

The following meter is used where the water demand varies considerable?

Back 28

Compound

Front 29

The carrying capacity of water mains is reduced by?

Back 29

Tuberculation

Front 30

When opening and closing valves in high pressure lines the valves should be?

Back 30

Opened and closed slowly

Front 31

The primary reason for a dry-barrel fire hydrant is to?

Back 31

Keep the hydrant from freezing

Front 32

The connection between a safe and unsafe water supply is called a?

Back 32

Cross connection

Front 33

How often should a reduced-pressure-zone backflow prevented be tested?

Back 33

Annually

Front 34

The most reliable backflow prevention "method" is?

Back 34

Air gap

Front 35

Of the mechanical backflow prevention devices listed, which isn't recommended to be used against backflow due to back pressure?

Back 35

Atmospheric vacuum breaker

Front 36

All community public water systems serving more than _____ service connections shall establish and maintain an adequate flushing program?

Back 36

50

Front 37

How far back from the edge of a trench should a "spoil" pile be kept?

Back 37

2 feet