Question 1

Naturally occurring concentrations of some toxic elements,such as arsenic,may exceed both recommended "safe" levels and wastewater standards for industry.

Accepted Answer

A) True 
 B)False  True

Question 2

The toxicity of industrial pollutants may go unrecognized for all of the following reasons except

Accepted Answer

A)  They often cause skin and eye irritation. 
B)  Their harmful effects may be slow to develop. 
C)  They may be harmful only in some concentrations or circumstances. 
D)  They cannot be tested for safety on all organisms. 
A)  They often cause skin and eye irritation. 
B)  Their harmful effects may be slow to develop. 
C)  They may be harmful only in some concentrations or circumstances. 
D)  They cannot be tested for safety on all organisms. A

Question 3

Concern about environmental pollution is such that comprehensive health hazard information has now been determined for most synthetic drugs and agricultural and industrial chemicals.

Accepted Answer

A) True 
 B)False  False

Question 4

Groundwater pollution is most often and most effectively treated in situ,which minimizes the risk of spreading the pollution.

Accepted Answer

A) True 
 B)False

Question 5

Dredging of a lake bottom

Accepted Answer

A)  May be done to remove toxic pollutants attached to sediment particles. 
B)  Can cause sediment pollution. 
C)  May reduce nutrient recycling from sediments. 
D)  All of the choices are correct. 
A)  May be done to remove toxic pollutants attached to sediment particles. 
B)  Can cause sediment pollution. 
C)  May reduce nutrient recycling from sediments. 
D)  All of the choices are correct.

Question 6

Biochemical oxygen demand is the amount of oxygen needed

Accepted Answer

A)  By humans to breathe. 
B)  By all organisms in a system, both plants and animals. 
C)  For aerobic breakdown of organic matter in a system. 
D)  To destroy all chemical pollutants in a system. 
A)  By humans to breathe. 
B)  By all organisms in a system, both plants and animals. 
C)  For aerobic breakdown of organic matter in a system. 
D)  To destroy all chemical pollutants in a system.

Question 7

Over time,dissolved magnesium concentration in a lake has reached equilibrium.Input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments.If wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,

Accepted Answer

A)  The BOD of the lake will double. 
B)  The BOD of the lake will be cut in half. 
C)  The residence time of magnesium in the lake will double. 
D)  The residence time of magnesium in the lake will be halved. 
A)  The BOD of the lake will double. 
B)  The BOD of the lake will be cut in half. 
C)  The residence time of magnesium in the lake will double. 
D)  The residence time of magnesium in the lake will be halved.

Question 8

Eutrophication does not occur naturally; it is the result of human activities altering the nutrient balance in water.

Accepted Answer

A) True 
 B)False

Question 9

After the dangers of DDT were recognized,use of toxic organic chemicals in agriculture was virtually eliminated in the United States.

Accepted Answer

A) True 
 B)False

Question 10

Ground water contaminated with acid rain percolates through a limestone aquifer.With longer residence time in the aquifer system,

Accepted Answer

A)  Dissolved sulfate in the water will increase. 
B)  Dissolved nitrate in the water will increase. 
C)  Dissolved bicarbonate in the water will increase. 
D)  All of the choices are correct. 
A)  Dissolved sulfate in the water will increase. 
B)  Dissolved nitrate in the water will increase. 
C)  Dissolved bicarbonate in the water will increase. 
D)  All of the choices are correct.

Question 11

Given the quantitative definition of residence time,the effect of increasing the rate of input of a chemical into a natural system at equilibrium would be to increase the chemical's residence time.

Accepted Answer

A) True 
 B)False

Question 12

Dumping lawn clippings into a stream will reduce this

Accepted Answer

A)  Flow rate. 
B)  Dissolved oxygen. 
C)  Dissolved nitrogen. 
D)  Biochemical oxygen demand. 
A)  Flow rate. 
B)  Dissolved oxygen. 
C)  Dissolved nitrogen. 
D)  Biochemical oxygen demand.

Question 13

Mercury is so toxic in all its forms that it is no longer used except as a poison,as in fungicides.

Accepted Answer

A) True 
 B)False

Question 14

In water,the organic matter load is explained by the

Accepted Answer

A)  Biological oxygen demand. 
B)  Biophysical oxygen demand. 
C)  Biometric oxygen demand. 
D)  Biochemical oxygen demand. 
A)  Biological oxygen demand. 
B)  Biophysical oxygen demand. 
C)  Biometric oxygen demand. 
D)  Biochemical oxygen demand.

Question 15

Chemical decontamination is principally used for small toxic-waste spills in surface waters.

Accepted Answer

A) True 
 B)False

Question 16

Point sources of pollution include all of the following except

Accepted Answer

A)  A septic tank leaking sewage. 
B)  Salt runoff from roads. 
C)  Wastewater from a factory. 
D)  Organic matter discharged from a meat-packing plant. 
A)  A septic tank leaking sewage. 
B)  Salt runoff from roads. 
C)  Wastewater from a factory. 
D)  Organic matter discharged from a meat-packing plant.

Question 17

Discharge of effluent from a water treatment plant into a stream increases the BOD of the water.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements is not true?

Accepted Answer

A)  Chemical treatment of sediment can be effective in reducing pollution problems, but it must be repeated every few years 
B)  Fast-flowing streams are generally better aerated than are lakes 
C)  A body of water is described as "dead" when it contains fatal concentrations of toxic chemicals 
D)  An oxygen sag curve describes changes in a stream's dissolved oxygen content along its length below an organic-matter source 
A)  Chemical treatment of sediment can be effective in reducing pollution problems, but it must be repeated every few years 
B)  Fast-flowing streams are generally better aerated than are lakes 
C)  A body of water is described as "dead" when it contains fatal concentrations of toxic chemicals 
D)  An oxygen sag curve describes changes in a stream's dissolved oxygen content along its length below an organic-matter source

Question 19

Pollution of surface water has nothing to do with pollution of groundwater.

Accepted Answer

A) True 
 B)False

Question 20

Groundwater pollution in situ is commonly handled by

Accepted Answer

A)  Waiting for the pollutants to disperse or break down. 
B)  Chemical decontamination to remove the pollutants. 
C)  Aeration to restore oxygen levels. 
D)  All of the choices are correct. 
A)  Waiting for the pollutants to disperse or break down. 
B)  Chemical decontamination to remove the pollutants. 
C)  Aeration to restore oxygen levels. 
D)  All of the choices are correct.

Naturally occurring concentrations of some toxic elements,such as arsenic,may exceed both recommended "safe" levels and wastewater standards for industry.

The toxicity of industrial pollutants may go unrecognized for all of the following reasons except

Concern about environmental pollution is such that comprehensive health hazard information has now been determined for most synthetic drugs and agricultural and industrial chemicals.

Groundwater pollution is most often and most effectively treated in situ,which minimizes the risk of spreading the pollution.

Dredging of a lake bottom

Biochemical oxygen demand is the amount of oxygen needed

Over time,dissolved magnesium concentration in a lake has reached equilibrium.Input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments.If wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,

Eutrophication does not occur naturally; it is the result of human activities altering the nutrient balance in water.

After the dangers of DDT were recognized,use of toxic organic chemicals in agriculture was virtually eliminated in the United States.

Ground water contaminated with acid rain percolates through a limestone aquifer.With longer residence time in the aquifer system,

Given the quantitative definition of residence time,the effect of increasing the rate of input of a chemical into a natural system at equilibrium would be to increase the chemical's residence time.

Dumping lawn clippings into a stream will reduce this

Mercury is so toxic in all its forms that it is no longer used except as a poison,as in fungicides.

In water,the organic matter load is explained by the

Chemical decontamination is principally used for small toxic-waste spills in surface waters.

Point sources of pollution include all of the following except

Discharge of effluent from a water treatment plant into a stream increases the BOD of the water.

Which of the following statements is not true?

Pollution of surface water has nothing to do with pollution of groundwater.

Groundwater pollution in situ is commonly handled by

Planet and Population: An Overview

Rocks and Minerals-A First Look

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Streams and Flooding

Coastal Zones and Processes

Mass Movements

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Climate-Past, present, and Future

Ground Water and Water Resources

Weathering, erosion, and Soil Resources

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Energy Resources-Fossil Fuels

Energy Resources-Alternative Sources

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Exam 17: Water Pollution

Naturally occurring concentrations of some toxic elements,such as arsenic,may exceed both recommended "safe" levels and wastewater standards for industry.

The toxicity of industrial pollutants may go unrecognized for all of the following reasons except

Concern about environmental pollution is such that comprehensive health hazard information has now been determined for most synthetic drugs and agricultural and industrial chemicals.

Groundwater pollution is most often and most effectively treated in situ,which minimizes the risk of spreading the pollution.

Dredging of a lake bottom

Biochemical oxygen demand is the amount of oxygen needed

Over time,dissolved magnesium concentration in a lake has reached equilibrium.Input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments.If wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,

Eutrophication does not occur naturally; it is the result of human activities altering the nutrient balance in water.

After the dangers of DDT were recognized,use of toxic organic chemicals in agriculture was virtually eliminated in the United States.

Ground water contaminated with acid rain percolates through a limestone aquifer.With longer residence time in the aquifer system,

Given the quantitative definition of residence time,the effect of increasing the rate of input of a chemical into a natural system at equilibrium would be to increase the chemical's residence time.

Dumping lawn clippings into a stream will reduce this

Mercury is so toxic in all its forms that it is no longer used except as a poison,as in fungicides.

In water,the organic matter load is explained by the

Chemical decontamination is principally used for small toxic-waste spills in surface waters.

Point sources of pollution include all of the following except

Discharge of effluent from a water treatment plant into a stream increases the BOD of the water.

Which of the following statements is not true?

Pollution of surface water has nothing to do with pollution of groundwater.

Groundwater pollution in situ is commonly handled by

Planet and Population: An Overview

Rocks and Minerals-A First Look

Plate Tectonics

Earthquakes

Volcanoes

Streams and Flooding

Coastal Zones and Processes

Mass Movements

Ice and Glaciers,wind and Deserts

Climate-Past, present, and Future

Ground Water and Water Resources

Weathering, erosion, and Soil Resources

Mineral and Rock Resources

Energy Resources-Fossil Fuels

Energy Resources-Alternative Sources

Waste Disposal

Air Pollution

Environmental Law and Policy

Land-Use Planning and Engineering Geology

Filters