Water

Question 1

Part 1: Sediment of Feature 30 requires that a water sample from a project site have a turbidity level of less than ___ nephelometric turbidity units (NTU).

Answer 1

1.0

Question 2

The Water Concept mainly addresses the quality of water that is being __

Answer 2

ingested

Question 3

A(n) ___ is a microorganism, including bacteria such as E. coli, naturally found in soil, vegetation, and in the intestinal tract of mammals.

Answer 3

Coliform

Question 4

Reverse-osmosis (RO) filtration systems are effective at removing containments, but the filtration process wastes about ___ of the incoming supply water.

Answer 4

50% to 80%

Question 5

A(n) ___ filter is a water filter that contains flakes or granules of a copper-and-zinc alloy.

Answer 5

Kinetic degradation fluxion (KDF)

Question 6

___ is a major herbicide that is likely to run off or leach into ground and surface water sources.

Answer 6

2,4-Dichlorophenoxyacetic acid (2,4-D)

Question 7

___ is a disinfectant formed when ammonia is added to chlorine and is commonly used as a secondary disinfectant in public water systems.

Answer 7

Chloramine

Question 8

Part 3: Fluoride of Feature 34, Public Water Additives, requires that the amount of fluoride in a water supply be limited to less than ___ mg/L.

Answer 8

4.0

Question 9

Part 3: Microbial Elimination of Feature 36 lists ___ as microbial elimination methods for any water that is used for human consumption or human contact.

Answer 9

UVGI filters and filters rated by the NSF

Question 10

___ water is water that is not fit for human consumption.

Answer 10

Non-potable

Question 11

The amount of cloudiness in a liquid caused by suspended solids that are usually invisible to the naked eye.

Answer 11

Pathogen

Question 12

A water filtration system that uses a semipermeable membrane to filter water.

Answer 12

Reverse-osmosis (RO) filtration system

Question 13

A bacterium that is found in freshwater and can cause a serious form of pneumonia called Legionnaires’ disease.

Answer 13

Legionella

Question 14

A water filtration system that uses oxygen-treated carbon to chemically bond with the organic contaminants in water.

Answer 14

Granular activated carbon (GAC) filtration system

Question 15

A microorganism in its dormant state that is resistant to typical disinfection methods.

Answer 15

Microbial cyst

Question 16

A compound that forms when chlorine and, to a slightly lesser extent, chloramine react with organic materials in a water supply.

Answer 16

Disinfectant by-product (DBP)

Question 17

A human-made compound or chemical containing carbon atoms that has leached into ground and surface water from industrial activities, such as the production of plastics.

Answer 17

Organic contaminant

Question 18

A sterilization method that uses UV light to break down microorganisms by destroying their DNA.

Answer 18

Ultraviolet germicidal irradiation (UVGI)

Question 19

A chemical that is used to destroy, repel, or control plants or animals.

Answer 19

Pesticide

Question 20

A popular herbicide that is used to control weeds.

Answer 20

Simazine

Question 21

Water that is fit for human consumption.

Answer 21

Potable water

Question 22

A nonselective herbicide that is used in many pesticide formulations, which may result in human exposure through its normal use due to spray drift, residues on food crops, and runoff into drinking water sources.

Answer 22

Glyphosate

Question 23

A disinfectant by-product formed when chlorine or chloramine reacts with organic matter in water.

Answer 23

Haloacetic acid (HAA)

Question 24

A naturally occurring chemical that prevents or helps reverse tooth decay.

Answer 24

Flouride

Question 25

Water that is used for cooling towers, boilers, and industrial processes.

Answer 25

Process water

Question 26

A compound that contains nutrients that encourage the growth of a plant.

Answer 26

Fertilizer

Question 27

A highly irritating, greenish-yellow gaseous halogen that can be introduced into a water supply as a gas, sodium hypochlorite solution, or calcium hypochlorite solid.

Answer 27

Chlorine

Question 28

A chemical pesticide, herbicide, or fertilizer that can be harmful to humans, animals, or the environment if it leaches into a water supply.

Answer 28

Agricultural contaminant

Question 29

The unit of measure for the turbidity of water.

Answer 29

Nephelometric turbidity unit (NTU)

Question 30

An infectious biological agent such as a bacterium, virus, or fungus that is capable of causing disease in its host.

Answer 30

Pathogen

Question 31

A pesticide that is among the most widely used pesticides in the United States to control broadleaf weeds in crops.

Answer 31

Atrazine

Question 32

An element or compound that may be found in a water supply, occurring from natural sources such as the geology of a location, resulting from human activities such as mining and industry, or leaching into a water supply through outdated or malfunctioning water supply infrastructure.

Answer 32

Inorganic contaminant

Question 33

A type of pesticide that contains chemicals used to destroy or inhibit the growth of unwanted plants.

Answer 33

Herbicide

Question 34

A disinfectant by-product that is formed when chlorine reacts with organic matter in water.

Answer 34

Trihalomethane (THM)

Question 35

A chemical that is used to control or destroy harmful microorganisms as well as prevent their formation on inanimate objects and surfaces or in liquids.

Answer 35

Disinfectant