FWTPLDS ESE 217 Group 5

Which of the following is not a nitrate removal process?

• Ion Exchange

• Ozone Disinfection

• Electrodialysis

• Blending

When this occurs, the exchange medium must be recharged or regenerated.

• Reverse Osmosis

• Softening Process

• Nanofiltration

• Recharging Process

In what year did France first use ozone to disinfect water supplies

• 1900

• 1901

• 1902

• 1903

Which of the following is one of the key design parameters for ion exchange that affects how much water can be treated before regeneration?

• Effluent flow rate

• Velocity of flow

• Pressure

• Influent flow rate

_ is the time ozone has to oxidize and disinfect or the time the water is allowed to hold the disinfectant.

• Contact time

• Disinfecting time

• Settling time

• Latent time

Water softeners are classified into _ different categories.

• 5

• 7

• 10

• 4

Which of the following processes does not produce ozone?

• Electrolysis

• Photosynthesis

• Photochemical reaction

• Radiochemical reaction by electrical discharge

The following are health problems caused by the presence of nitrate in drinking water except:

• Carcinogenic formation of nitroamides

• Carcinogenic formation of nistrosamines

• Carcinogenic formation of nitrocobinamide

• Metheglobinemia

Which of the following is not true?

• Buy more equipment than you need. Other removal systems might be better suited for the removal of certain impurities.

• Test your water to determine the hardness and other impurities that may need to be removed?

• Determine how much softened water your household needs per day, per year.

• Equipment should carry UL and NSF or WQA approval.

Unstable gas produced when oxygen molecules dissociate into atomic oxygen.

• Argon

• Oxygen

• Nitrogen

• Ozone