Chapter 7

Question 1

The Rio Grande River is the longest river in Texas, stretching _____miles along the Mexico Border

Answer 1

1250

Question 2

_______reservoir is the largest lake entirely within Texas

Answer 2

Sam Rayburn

Question 3

Raw water intakes must not be located within _______feet of boat ramps, marinas, docks or fishing piers

Answer 3

1,000

Question 4

A restricted zone of ______feet radius from the raw water intake must be established and recreational activities and trespassing shall be prohibited

Answer 4

200

Question 5

Surface water is usually low in _____and ______

Answer 5

Minerals / Gases

Question 6

Bacteria, algae, and turbidity can be a problem in surface water as well as municipal, industrial and agricultural pollution. ( true or false )

Answer 6

True

Question 7

TCEQ defines ( COMPLETE TREATMENT ) as the following sequence of processes : pretreatment disinfection, taste and odor control, continuous coagulation , sedimentation , filtration , terminal disinfection, and covered storage ( true and false )

Answer 7

True

Question 8

Destratification is the mixing of lake water by compressed air to prevent layers of different _______ from developing

Answer 8

Temperature

Question 9

The primary goal of coagulation , sedimentation and filtration is to remove _________

Answer 9

Turbidity

Question 10

Turbidity can shelter bacteria from the disinfection process ( true or false)

Answer 10

True

Question 11

The two pathogenic protozoans resistant to chlorination are _______ and _______

Answer 11

Giardia / Cryptosporidium

Question 12

Coagulation works by the bonding of negatively charged turbidity to positively charged chemical coagulants

Answer 12

True

Question 13

Chemical dosage, water temperature , PH, _______, and the characteristics of the raw water all have an affect on the coagulation process

Answer 13

Mixing

Question 14

Operators run jar tests to select the most effective coagulant and dosage ( true or false)

Answer 14

True

Question 15

The process of separating floc from water by gravity is ___________

Answer 15

Sedimentation

Question 16

Filtration is the ______step in the removal of suspended solids

Answer 16

Last

Question 17

Filtration is the last barrier between the public and _______or________

Answer 17

Giardia / cryptosporidium

Question 18

TCEQ requires filtered water to be 0.3 NTUs or less in at least 95% of measurements each month ( true or false ) .3 NTUS of Turbidity

Answer 18

True

Question 19

Filter problems include air binding , mud balls , media cracks, and media loss. ( true or false)

Answer 19

True

Question 20

If the media collects in the wash water troughs, the wash rate is to high ( true or false )

Answer 20

True

Question 21

All public water systems on texas are required are required to use _____as the final disinfectant

Answer 21

Chlorine

Question 22

Treated water is stored at the plant in a tank called a clear well ( true or false)

Answer 22

True