Water Certification Review

Front 1

What do you call the clumping together of very fine particles into larger particles after the addition of a chemical?

Back 1

Coagulation

Front 2

WTP operators are mainly concerned with particles that have what type of charge?

Back 2

Negative charge

Front 3

The capacity of water to neutralize acid is called?

Back 3

Alkalinity

Front 4

What parameter is measured when water is titration with 0.2 N H2SO4 to a ph of 4.5?

Back 4

Total Alkalinity

Front 5

Water color that includes not only the color due to substances in the water but suspended matter as well is called?

Back 5

Apparent color

Front 6

Water color of a sample that has had turbidity removed is called?

Back 6

True color

Front 7

What is the primary MCL for Fluoride

Back 7

4

Front 8

What is the Secondary MCL

Back 8

2

Front 9

What is the purpose of adding fluoride to water?

Back 9

To prevent caries, Cavities

Front 10

Adding too much fluoride to water will cause?

Back 10

Mottling your teeth (staining them brown)

Front 11

What do you give someone who has swallowed fluoride?

Back 11

Water or Milk

Front 12

What is the first symptom of swallowing fluoride?

Back 12

Vomiting

Front 13

What is the first symptom of inhaling fluoride?

Back 13

Nose bleed

Front 14

If you use sodium fluoride in fluoridation, what must be done to the water if the hardness is above 75?

Back 14

Soften the water

Front 15

When feeding sodium fluoride with a saturator, above what water pH will scaling occur?

Back 15

10

Front 16

How many ppm of fluoride must be added to the finished water if the raw water fluoride content is 0.15 ppm and the desired fluoride limit is 8 ppm?

Back 16

.65 ppm

Front 17

What is a day tank

Back 17

A tank that holds enough chemical to feed water produced in a day?

Front 18

What type of pump is used to feed chemicals

Back 18

Positive Displacement (Piston)

Front 19

Recommended Control Limits are fluoride concentrations are based on?

Back 19

The annual average of maximum daily temperatures

Front 20

What is the most common fluoride compound used in water treatment

Back 20

Hydrofluosilicic Acid

Front 21

The three most common fluoride compounds used in water treatment are?

Back 21

Hydrofluosilicic Acid, Sodium Fluoride, Sodium Silcofluoride

Front 22

When choosing fluoride-pumping equipment, the most important criteria is?

Back 22

Accuracy

Front 23

Fluoride doses must never be metered against a?

Back 23

Negative or Suction Head

Front 24

Fluoride systems must be designed with the means to prevent?

Back 24

Backsiphonage and Overfeeding

Front 25

Fluoride systems should be designed by?

Back 25

An engineer

Front 26

If an operator gets fluoride on his skin or in his eyes, the recommended first aid is?

Back 26

Flush with large amounts of water for 15 minutes

Front 27

Never operate a positive displacement pump against?

Back 27

Closer valve

Front 28

A form of backflow caused by a negative or below atmospheric pressure within a water system is called?

Back 28

Backsiphonage