Chapter 8

Question 1

Water is stored to meet peak demand and to allow production facilities to operate at ______ rates

Answer 1

Uniform

Question 2

Stored water can meet sudden demands such as fire, absorb pressure surges, provide detention /contact time for _____, and allow for expansion of the distribution system

Answer 2

Chlorination

Question 3

Pressure from an elevated tank is caused by the height of the column of water in ______

Answer 3

Pounds per square inch

Question 4

The water column must be at least ____feet higher than the highest service connection to be considered elevated storage

Answer 4

80

Question 5

Roof vents must be screened with ______ mesh or finer corrosion -resistant material

Answer 5

16

Question 6

All roof hatches must be ______

Answer 6

Locked

Question 7

Ground water supply systems serving more than 50 connections must have a ground (total) storage capacity of 200 gallons per connection and elevated storage capacity of 100 gallons per connection or pressure tank capacity of 20 gallons per connection. ( true or false )

Answer 7

True

Question 8

A _______, internal, and documented inspection of all storage tanks is required

Answer 8

Yearly

Question 9

Potable water storage tank inspection results must be maintained at least ______ year

Answer 9

5

Question 10

All community systems must post at each production and storage site a sign stating the name ________

Answer 10

Emergency

Question 11

An intruder - resistant fence with lovable gates must enclose the storage site (true or false )

Answer 11

True

Question 12

The system must be maintain a minimum pressure of _____psi under normal conditions and at least _____psi during emergencies

Answer 12

35 / 20

Question 13

Pipe and fittings must not contain more than _____% lead, or solder and flux containing more than ____% lead

Answer 13

8 / 0.2

Question 14

A ______valve is the most common isolating valve in the distribution system

Answer 14

Gate

Question 15

Dead end mains must be provided with ________

Answer 15

Flush valves

Question 16

Service tap components usually include a tapping saddle , corporation stop, service line tubing, curb stop and________

Answer 16

Meter

Question 17

When trenching, the spoil bank should be more than ______feet from the excavation

Answer 17

2

Question 18

Trenches or ditches ___feet or deeper should be shored

Answer 18

5

Question 19

TCEQ requires at least 1 Bac - T sample for each 1,000 feet of new main ( true or false)

Answer 19

True

Question 20

For a new main , hold a chlorine dose of _____mg/l or more for ______hours

Answer 20

25 / 24

Question 21

If a repaired main must be returned to service quickly, dose it with _____mg/l for 30 minutes

Answer 21

500

Question 22

Dead end mains must be flushed at least _______

Answer 22

Monthly

Question 23

Corrosion results in tuberculation , a mineral build up usually of oxidized _________

Answer 23

Iron

Question 24

Methods of fighting corrosion include coatings , PH adjustment , and cathodic protection ( true or false)

Answer 24

True

Question 25

Back flow prevention measures include approved check valve assemblies , vacuum breakers and air gaps ( true or false)

Answer 25

True

Question 26

The ____ is TCEQs first choice to be used for back flow prevention when health hazards are involved

Answer 26

Air gap

Question 27

Common cross connections include a garden hose connected to a potable water source and submerged in a stock tank , a home served by a city water supply and private well , and a chemical container connected to a potable water supply ( true or false

Answer 27

True

Question 28

There are 2 primary categories of pumps : centrifugal and ________ displacement

Answer 28

Positive

Question 29

The force a pump works against is called head and is measured in feet of water or ______

Answer 29

Psi.

Question 30

The total dynamic head a pump must overcome is the distance from the water level on the suction side of the pump to the top of the water level on the discharge side of the the pump and includes any friction and head loss encountered. ( true or false)

Answer 30

True