Deck 23: Water Treatment

Question 1

Describe the differences between primary and secondary standards as established by the EPA.

Answer 1

Primary standards are health-based and enforceable, and secondary standards deal with the aesthetic quality of water such as color, odor, and taste.

Question 2

For people who cannot tolerate sodium ions, ____________________ is another method of removing unwanted matter from water.

Answer 2

reverse osmosis

Question 3

Which water treatment method uses a pump to supply a desired chemical to the water at a rate proportional to the system flow?

A)neutralizing tank
B)chemical feeder
C)ozone injection
D)diatomaceous earth filter

Answer 3

B

Question 4

Which of the following treatment methods is used to minimize hardness of the water?

A)softeners
B)neutralizing tanks
C)activated charcoal filters
D)manganese oxidizing filters

Question 5

____________________ is a gas that is very effective in killing organisms, approximately 10 times more powerful than chlorine.

Question 6

____________________filters are composed primarily of fossilized remains of diatoms, a type of hard-shelled algae, which coat a fabric to form the filtering material.

Question 7

Green stains appearing on a fixture under the faucet are likely caused by which type of water problem?

A)turbidity
B)hardness
C)acidity
D)dissolved iron

Question 8

Red staining of fixtures is a symptom of which type of water problem?

A)turbidity
B)hardness
C)acidity
D)dissolved iron

Question 9

Name at least two purposes of a water conditioning system.

Question 10

A(n)____________________ technique is an enforceable procedure or level of technological performance that must be followed by public water systems to ensure control of a contaminant.

Question 11

Which of the following treatment methods is used to kill bacteria and other harmful organisms?

A)diatomaceous earth filter
B)activated charcoal filter
C)ultraviolet radiation
D)neutralizing tank

Question 12

Which type of EPA standards are health-based and enforceable water quality standards?

A)primary
B)secondary
C)Maximum Contaminant Levels (MCLs)
D)Maximum Contaminant Level Goals (MCLGs)

Question 13

Bathtub ring is caused by which of the following water problems?

A)turbidity
B)hardness
C)acidity
D)dissolved iron

Question 14

Which of the following treatment methods is used to remove hydrogen sulfide?

A)softeners
B)neutralizing tanks
C)activated charcoal filters
D)ozone injection

Question 15

Which of the following treatment methods is used to control acidity?

A)softeners
B)neutralizing tanks
C)activated charcoal filters
D)manganese oxidizing filters

Question 16

Which of the following treatment methods is used to remove dissolved iron?

A)softeners
B)neutralizing tanks
C)chlorination
D)manganese oxidizing filters