Question 1

Which product of anoxic sewage treatment can be used to heat and power an entire water treatment facility?

Accepted Answer

A) CO₂ 
B) H₂ 
C) CH₄ 
D) O₂ 
A) CO₂ 
B) H₂ 
C) CH₄ 
D) O₂

Question 2

Metal-reducing Geobacter and Shewanella species are important in the microbial mining of metals.

Accepted Answer

A) True 
 B)False

Question 3

Microbes are involved in which step(s)of wastewater treatment?

Accepted Answer

A) primary only 
B) secondary and tertiary 
C) secondary only 
D) primary and secondary 
A) primary only 
B) secondary and tertiary 
C) secondary only 
D) primary and secondary

Question 4

Trace the flow of raw water through a typical drinking water purification scheme.

Accepted Answer

The general steps include: sed

Question 5

To prevent the souring of crude oil,________ is added to oil well injection water to encourage ________ instead of ________.

Accepted Answer

A) oxygen / aerobic respiration / sulfate reduction 
B) sulfate / sulfate reduction / fermentation 
C) sulfate / sulfate reduction / nitrate reduction 
D) nitrate / nitrate reduction / sulfate reduction 
A) oxygen / aerobic respiration / sulfate reduction 
B) sulfate / sulfate reduction / fermentation 
C) sulfate / sulfate reduction / nitrate reduction 
D) nitrate / nitrate reduction / sulfate reduction

Question 6

Subway air and water distribution systems harbor dangerous levels of pathogenic microorganisms.

Accepted Answer

A) True 
 B)False

Question 7

The goal of tertiary wastewater treatment is to sharply reduce the levels of ________ from the final effluent.

Accepted Answer

A) organic compounds 
B) heavy metals 
C) methane 
D) inorganic nutrients 
A) organic compounds 
B) heavy metals 
C) methane 
D) inorganic nutrients

Question 8

Describe the general processes that occur in a sludge digester.What is an advantage of sludge digestion over activated sludge?

Accepted Answer

Secondary anaerobic wastewater treatment

Question 9

During secondary aerobic wastewater treatment,some of the activated sludge goes ________ while the rest goes ________.

Accepted Answer

A) back to the aerator / to the anoxic sludge digestor 
B) back to the primary system / to the aerator 
C) to the anoxic digestor / back to the primary system 
D) back to the primary system / to the tertiary digestor 
A) back to the aerator / to the anoxic sludge digestor 
B) back to the primary system / to the aerator 
C) to the anoxic digestor / back to the primary system 
D) back to the primary system / to the tertiary digestor

Question 10

What is the advantage of enhanced biological phosphorus removal (EBPR)over chemical precipitation?

Accepted Answer

A) Chemical precipitation produces sludge containing arsenic. 
B) EBPR removes significantly more phosphorus than chemical precipitation. 
C) Significantly less sludge is produced by EBPR compared to chemical precipitation. 
D) EBPR is a more stable process. 
A) Chemical precipitation produces sludge containing arsenic. 
B) EBPR removes significantly more phosphorus than chemical precipitation. 
C) Significantly less sludge is produced by EBPR compared to chemical precipitation. 
D) EBPR is a more stable process.

Question 11

Microbial immobilization is the best strategy for uranium bioremediation,because

Accepted Answer

A) uranium is difficult to chemically oxidize. 
B) uranium contamination is widespread and thus difficult to physically remove. 
C) the by-products of chemical immobilization are toxic. 
D) immobilization may only be temporary. 
A) uranium is difficult to chemically oxidize. 
B) uranium contamination is widespread and thus difficult to physically remove. 
C) the by-products of chemical immobilization are toxic. 
D) immobilization may only be temporary.

Question 12

What role does Acidithiobacillus ferrooxidans play in the copper leaching process?

Accepted Answer

A) oxidation of sulfide to sulfate 
B) reduction of oxidized iron (Fe³⁺)to reduced iron (Fe²⁺) 
C) oxidation of reduced iron (Fe²⁺)to oxidized iron (Fe³⁺) 
D) reduction of sulfate to sulfide 
A) oxidation of sulfide to sulfate 
B) reduction of oxidized iron (Fe³⁺)to reduced iron (Fe²⁺) 
C) oxidation of reduced iron (Fe²⁺)to oxidized iron (Fe³⁺) 
D) reduction of sulfate to sulfide

Question 13

Natural underground pyritic deposits that are not disturbed by mining activities do not form acidic drainage waters.Why not? Explain the critical steps in the formation of acid mine drainage in your answer.

Accepted Answer

The initiation,or first,step in the form

Question 14

Although the sulfate-reducing bacteria are thought to be critical in the corrosion of metal structures,the mechanism of metal corrosion is not well understood.

Accepted Answer

A) True 
 B)False

Question 15

BOTH physical and chemical methods are used to treat and purify drinking water.

Accepted Answer

A) True 
 B)False

Question 16

The goal of wastewater treatment is to

Accepted Answer

A) produce potable water. 
B) remove pathogens from wastewater before it is released. 
C) reduce organic and inorganic materials in wastewater to a level that no longer supports microbial growth. 
D) remove pathogens from wastewater to produce potable water. 
A) produce potable water. 
B) remove pathogens from wastewater before it is released. 
C) reduce organic and inorganic materials in wastewater to a level that no longer supports microbial growth. 
D) remove pathogens from wastewater to produce potable water.

Question 17

Microbes are sometimes used in secondary treatment of wastewater to

Accepted Answer

A) convert heavy metals into carbon dioxide. 
B) remove organic matter. 
C) remove large particles. 
D) convert heavy metals into carbon dioxide,remove organic matter,and remove large particles. 
A) convert heavy metals into carbon dioxide. 
B) remove organic matter. 
C) remove large particles. 
D) convert heavy metals into carbon dioxide,remove organic matter,and remove large particles.

Question 18

Which of the following bacterial pathogens is found in water distribution systems?

Accepted Answer

A) Enterobacter aerogenes 
B) Klebsiella pneumoniae 
C) Legionella pneumophila 
D) Vibrio cholerae 
A) Enterobacter aerogenes 
B) Klebsiella pneumoniae 
C) Legionella pneumophila 
D) Vibrio cholerae

Question 19

Chlorine is consumed when it reacts with organic materials.

Accepted Answer

A) True 
 B)False

Question 20

Which group of organisms is thought to be responsible for the corrosion of submerged metal structures and oil pipelines?

Accepted Answer

A) fermentative microorganisms 
B) acidophilic iron-oxidizers 
C) sulfate reducers 
D) hydrocarbon-degrading anaerobes 
A) fermentative microorganisms 
B) acidophilic iron-oxidizers 
C) sulfate reducers 
D) hydrocarbon-degrading anaerobes

Exam 21: Microbiology of the Built Environment

Which product of anoxic sewage treatment can be used to heat and power an entire water treatment facility?

Metal-reducing Geobacter and Shewanella species are important in the microbial mining of metals.

Microbes are involved in which step(s)of wastewater treatment?

Trace the flow of raw water through a typical drinking water purification scheme.

To prevent the souring of crude oil,________ is added to oil well injection water to encourage ________ instead of ________.

Subway air and water distribution systems harbor dangerous levels of pathogenic microorganisms.

The goal of tertiary wastewater treatment is to sharply reduce the levels of ________ from the final effluent.

Describe the general processes that occur in a sludge digester.What is an advantage of sludge digestion over activated sludge?

During secondary aerobic wastewater treatment,some of the activated sludge goes ________ while the rest goes ________.

What is the advantage of enhanced biological phosphorus removal (EBPR)over chemical precipitation?

Microbial immobilization is the best strategy for uranium bioremediation,because

What role does Acidithiobacillus ferrooxidans play in the copper leaching process?

Natural underground pyritic deposits that are not disturbed by mining activities do not form acidic drainage waters.Why not? Explain the critical steps in the formation of acid mine drainage in your answer.

Although the sulfate-reducing bacteria are thought to be critical in the corrosion of metal structures,the mechanism of metal corrosion is not well understood.

BOTH physical and chemical methods are used to treat and purify drinking water.

The goal of wastewater treatment is to

Microbes are sometimes used in secondary treatment of wastewater to

Which of the following bacterial pathogens is found in water distribution systems?

Chlorine is consumed when it reacts with organic materials.

Which group of organisms is thought to be responsible for the corrosion of submerged metal structures and oil pipelines?

Microorganisms and Microbiology

Microbial Cell Structure and Function

Microbial Metabolism

Molecular Biology

Microbial Growth and Control

Microbial Genomics

Metabolic Regulation

Viruses and Virology

Viral Genomes and Diversity

Genetics of Bacteria and Archaea

Genetic Engineering and Biotechnology

Microbial Evolution and Systematics

Metabolic Diversity of Microorganisms

Functional Diversity of Bacteria

Diversity of Bacteria

Diversity of Archaea

Diversity of Eukaryotic Microorganisms

Methods in Microbial Ecology

Microbial Ecosystems

Nutrient Cycles

Microbial Symbioses

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology

Epidemiology

Person-To-Person Bacterial and Viral Diseases

Vectorborne and Soilborne Bacterial and Viral Diseases

Water and Food As Vehicles of Bacterial Diseases

Eukaryotic Pathogens: Fungal and Parasitic Diseases

Filters

To prevent the souring of crude oil, is added to oil well injection water to encourage instead of .

During secondary aerobic wastewater treatment,some of the activated sludge goes while the rest goes .