Question 1

Lakes and streams with limestone rock bottoms are less susceptible to

Accepted Answer

A) high levels of BOD. 
B) anaerobic organisms. 
C) acidification. 
D) low DO. 
A) high levels of BOD. 
B) anaerobic organisms. 
C) acidification. 
D) low DO.

Question 2

Municipal water supplies are disinfected by treatment either with chlorine or with ozone.One advantage which chlorine has over ozone is that

Accepted Answer

A) chlorine treatment kills viruses and ozone does not. 
B) chlorine treatment converts dissolved organic compounds into chlorinated hydrocarbons. 
C) chlorine leaves a taste in the water. 
D) chlorine continues to provide protection against microorganisms even after the water leaves the treatment plant. 
A) chlorine treatment kills viruses and ozone does not. 
B) chlorine treatment converts dissolved organic compounds into chlorinated hydrocarbons. 
C) chlorine leaves a taste in the water. 
D) chlorine continues to provide protection against microorganisms even after the water leaves the treatment plant.

Question 3

Ice is ________ (less/more)dense than liquid water.

Accepted Answer

The answer of Ice is ________ (less/more)dense than liquid water....

Question 4

Under aerobic conditions,microorganisms ________ organic matter; under anaerobic conditions,microorganisms ________ organic matter.

Accepted Answer

The answer of Under aerobic conditions,microorganisms ________ organic matter; under...

Question 5

Which of the following human activities contribute significantly to increased water pollution?

Accepted Answer

A) oil spills 
B) releasing industrial wastes 
C) pouring household chemicals, outdated medicines, etc.down the drain 
D) All of these contribute significantly to water pollution. 
A) oil spills 
B) releasing industrial wastes 
C) pouring household chemicals, outdated medicines, etc.down the drain 
D) All of these contribute significantly to water pollution.

Question 6

The major use of water in the United States is for public water supplies.

Accepted Answer

A) True 
 B)False

Question 7

Anaerobic degradation of organic material in water systems occurs in the absence of

Accepted Answer

A) dissolved oxygen. 
B) dissolved nitrogen. 
C) nutrients. 
D) sunlight. 
A) dissolved oxygen. 
B) dissolved nitrogen. 
C) nutrients. 
D) sunlight.

Question 8

One of the potential problems with chlorination of waste water is that it

Accepted Answer

A) provides no residual protection. 
B) is ineffective against pathogenic bacteria. 
C) produces low levels of chlorinated hydrocarbons. 
D) is more expensive than other approaches. 
A) provides no residual protection. 
B) is ineffective against pathogenic bacteria. 
C) produces low levels of chlorinated hydrocarbons. 
D) is more expensive than other approaches.

Question 9

About ________ of the world's fresh water supply is used in agriculture.

Accepted Answer

A) 10% 
B) 45% 
C) 85% 
D) 70% 
A) 10% 
B) 45% 
C) 85% 
D) 70%

Question 10

Primary sewage treatment involves

Accepted Answer

A) aeration. 
B) settling. 
C) chemical treatment. 
D) Primary sewage treatment involves all of the above. 
A) aeration. 
B) settling. 
C) chemical treatment. 
D) Primary sewage treatment involves all of the above.

Question 11

A possible new technology for disinfecting drinking water involves using ultraviolet light.

Accepted Answer

A) True 
 B)False

Question 12

The EPA drinking water standard for toluene is 1 mg/L.What is this concentration in ppb?

Accepted Answer

A) 0)001 
B) 0)1 
C) 1 
D) 1000 
A) 0)001 
B) 0)1 
C) 1 
D) 1000

Question 13

The metal ion found in clays and other minerals that appears to be deadly to young fish is ________.

Accepted Answer

A) potassium 
B) strontium 
C) aluminum 
D) sodium 
A) potassium 
B) strontium 
C) aluminum 
D) sodium

Question 14

Zeolites can be modified to remove heavy metal from drinking water.How is this accomplished?

Accepted Answer

A) The pore size in the zeolite is made smaller. 
B) The pore size in the zeolite is increased. 
C) Sodium and potassium ions are bound to the zeolite structure. 
D) Calcium and magnesium cations are replaced with sodium and potassium cations. 
A) The pore size in the zeolite is made smaller. 
B) The pore size in the zeolite is increased. 
C) Sodium and potassium ions are bound to the zeolite structure. 
D) Calcium and magnesium cations are replaced with sodium and potassium cations.

Question 15

Which company's industrial waste water would have a relatively high BOD?

Accepted Answer

A) Tasty Tomato Canning Company 
B) Shameless Stripper Coal Mine 
C) Bullworks Ammonia Company 
D) Spotless Steel Works, Inc. 
A) Tasty Tomato Canning Company 
B) Shameless Stripper Coal Mine 
C) Bullworks Ammonia Company 
D) Spotless Steel Works, Inc.

Question 16

The dramatic temperature changes on the moon between day and night are not seen on the earth because of what property of water?

Accepted Answer

A) excellent solvent 
B) less dense as a solid 
C) high heat capacity 
D) All of the above contribute. 
A) excellent solvent 
B) less dense as a solid 
C) high heat capacity 
D) All of the above contribute.

Question 17

Which of these common human activities contribute to BOD?

Accepted Answer

A) dumping detergents in a lake or pond 
B) swimming in a lake or pond 
C) paddling a boat across a lake or pond 
D) fishing in a lake or pond 
A) dumping detergents in a lake or pond 
B) swimming in a lake or pond 
C) paddling a boat across a lake or pond 
D) fishing in a lake or pond

Question 18

Bottled water generally has fewer dissolved ions than tap water.

Accepted Answer

A) True 
 B)False

Question 19

One of the advantages of treating sewage effluent with ozone as opposed to chlorine is

Accepted Answer

A) O₃ is more effective in killing viruses. 
B) O₃ is more effective in killing bacteria. 
C) O₃ provides a residual protection against bacteria. 
D) O₃ is less expensive. 
A) O₃ is more effective in killing viruses. 
B) O₃ is more effective in killing bacteria. 
C) O₃ provides a residual protection against bacteria. 
D) O₃ is less expensive.

Question 20

A contaminant in well water in many areas is

Accepted Answer

A) nitrates. 
B) butanol. 
C) silver. 
D) carbonates. 
A) nitrates. 
B) butanol. 
C) silver. 
D) carbonates.

Exam 14: Water

Lakes and streams with limestone rock bottoms are less susceptible to

Municipal water supplies are disinfected by treatment either with chlorine or with ozone.One advantage which chlorine has over ozone is that

Ice is ________ (less/more)dense than liquid water.

Under aerobic conditions,microorganisms ________ organic matter; under anaerobic conditions,microorganisms ________ organic matter.

Which of the following human activities contribute significantly to increased water pollution?

The major use of water in the United States is for public water supplies.

Anaerobic degradation of organic material in water systems occurs in the absence of

One of the potential problems with chlorination of waste water is that it

About ________ of the world's fresh water supply is used in agriculture.

Primary sewage treatment involves

A possible new technology for disinfecting drinking water involves using ultraviolet light.

The EPA drinking water standard for toluene is 1 mg/L.What is this concentration in ppb?

The metal ion found in clays and other minerals that appears to be deadly to young fish is ________.

Zeolites can be modified to remove heavy metal from drinking water.How is this accomplished?

Which company's industrial waste water would have a relatively high BOD?

The dramatic temperature changes on the moon between day and night are not seen on the earth because of what property of water?

Which of these common human activities contribute to BOD?

Bottled water generally has fewer dissolved ions than tap water.

One of the advantages of treating sewage effluent with ozone as opposed to chlorine is

A contaminant in well water in many areas is

Chemistry

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Under aerobic conditions,microorganisms organic matter; under anaerobic conditions,microorganisms organic matter.