Apes 8 Sewage

Which of the following regions of the ocean is LEAST likely to contain photosynthetic organisms

• Intertidal zone

• Zone of coastal up-welling

• Euphotic zone

• Abyssal Zone

• Pelagic zone

Waste from which of the following is an example of nonpoint source pollution?

• Overflow from a sewage treatment plant

• Outgassing from a municipal landfill

• Dumping at a food-processing plant

• Drainage from an abandoned mine

• Runoff from agricultural fields

Of the following, which constitutes the greatest percent of domestic use of water in the United States?

• Flushing toilets

• Drinking

• Cooking

• Washing dishes

• Washing clothes

Of the following, which is the best example of a point source of water pollution?

• Factory effluent

• Storm water

• Acid precipitation

• Agricultural runoff

• Residential pesticide runoff

Which of the following will result in accelerated eutrophication when introduced into streams, lakes and bays?

• Bacteria and viruses

• Pesticides

• Herbicides

• Phosphates

• Acid wastes and salts

The graph above shows the effect of sewage on biological oxygen demand (BOD) and dissolved oxygen (DO) in a flowing stream. The smallest fish populations will most probably be found at point

• A

• B

• C

• D

• E

List the following steps of Water purification in the correct order

Step P: Water is passed through a screen to remove debris.

Step Q: Pathogenic organisms are killed by chlorination, UV, or ozone.

Step R: Suspended particles clump and settle out.

Step S: A flocking agent, such as alum, is added to the water.

• P, Q, R, S

• S, P, R, Q

• P, S, R, Q

• R, P, S, Q

• S, R, P, Q

Which of the following is true of sewage treatment plants in the United States?

• They release wastewater before solids are removed from the sewage.

• They use stormwater runoff to assist in the treatment process.

• They are not designed to remove pharmaceutical chemicals from wastewater.

• They have largely eliminated cultural eutrophication in Chesapeake Bay.

• They release wastewater that is not regulated by the Clean Water Act.

Which method introduces microorganisms to break down hazardous organic compounds?

• Sanitary landfill

• Incineration

• Discharge to sewers, streams, and rivers

• Chemical treatment

• Biological treatment

Which method would be best suited for neutralizing the acidic components of waste?

• Sanitary landfill

• Incineration

• Discharge to sewers, streams, and rivers

• Chemical treatment

• Biological treatment