Question 1

Water disinfection agents such as chlorine can easily inactivate viruses.

Accepted Answer

A) True 
 B)False

Question 2

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 3

What chemical initiates the formation of acid mine drainage when pyrite is not disposed of properly?

Accepted Answer

A)  O₂ 
B)  Fe²⁺ 
C)  HS⁻ 
D)  SO₄²⁻ 
A)  O₂ 
B)  Fe²⁺ 
C)  HS⁻ 
D)  SO₄²⁻

Question 4

Compare the operation and function of a trickling filter system and activated sludge.

Accepted Answer

Both systems are used as a secondary aer

Question 5

Opportunistic pathogens such as Legionella,Pseudomonas,and Mycobacterium species have the ability to grow within ________,which may enhance their ability to survive in water distribution systems.

Accepted Answer

A)  human saliva 
B)  fish 
C)  protists 
D)  UV irradiated water 
A)  human saliva 
B)  fish 
C)  protists 
D)  UV irradiated water

Question 6

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 7

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 8

The production of ________ by ________ is thought to be a major contributor to the biodeterioration of stone building materials.

Accepted Answer

A)  oxalic acid / fungi 
B)  sulfuric acid / sulfate reducers 
C)  nitric acid / nitrate reducers 
D)  carbonic acid / lichens 
A)  oxalic acid / fungi 
B)  sulfuric acid / sulfate reducers 
C)  nitric acid / nitrate reducers 
D)  carbonic acid / lichens

Question 9

Aerobic secondary treatment is usually best for ________ wastewater.

Accepted Answer

A)  industrial 
B)  agricultural 
C)  residential 
D)  chemical 
A)  industrial 
B)  agricultural 
C)  residential 
D)  chemical

Question 10

Effluent water is wastewater

Accepted Answer

A)  discharged from the pharmaceutical, plastics, and petrochemical industries. 
B)  discharged from the wastewater treatment facility. 
C)  that has undergone anoxic secondary wastewater treatment. 
D)  that is imported to the wastewater treatment facility for treatment. 
A)  discharged from the pharmaceutical, plastics, and petrochemical industries. 
B)  discharged from the wastewater treatment facility. 
C)  that has undergone anoxic secondary wastewater treatment. 
D)  that is imported to the wastewater treatment facility for treatment.

Question 11

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 12

Which statement BEST describes sewage and wastewater?

Accepted Answer

A)  Wastewater is a subset of sewage. 
B)  Sewage is a subset of wastewater. 
C)  Wastewater and sewage are virtually synonymous. 
D)  Wastewater and sewage are both subsets of all liquid effluents from domestic and industrial sources. 
A)  Wastewater is a subset of sewage. 
B)  Sewage is a subset of wastewater. 
C)  Wastewater and sewage are virtually synonymous. 
D)  Wastewater and sewage are both subsets of all liquid effluents from domestic and industrial sources.

Question 13

The use of ________ to treat drinking water,which began in 1913,reduces the incidence of waterborne diseases.

Accepted Answer

A)  coagulation 
B)  chlorination 
C)  filtration 
D)  UV irradiation 
A)  coagulation 
B)  chlorination 
C)  filtration 
D)  UV irradiation

Question 14

Water leaving an efficient wastewater treatment facility ideally has a biochemical oxygen demand (BOD)between ________ units.

Accepted Answer

A)  50 and 100 
B)  25 and 50 
C)  5 and 25 
D)  0 and 5 
A)  50 and 100 
B)  25 and 50 
C)  5 and 25 
D)  0 and 5

Question 15

For water to be considered safe to drink,it MUST be treated with four distinct methods.

Accepted Answer

A) True 
 B)False

Question 16

Microbial plastics are composed of

Accepted Answer

A)  polysaccharides. 
B)  polyhydroxyalkanoates. 
C)  polyaromatic hydrocarbons. 
D)  xenobiotics. 
A)  polysaccharides. 
B)  polyhydroxyalkanoates. 
C)  polyaromatic hydrocarbons. 
D)  xenobiotics.

Question 17

Which microorganisms commonly thrive in drinking water distribution systems and how might they impact human health?

Accepted Answer

Despite sufficient chlorination of drink

Question 18

Inorganic pollutants such as metals and radionuclides can be completely destroyed through bioremediation.

Accepted Answer

A) True 
 B)False

Question 19

Why are some xenobiotics biodegraded slower than crude oil and petroleum products?

Accepted Answer

A)  Xenobiotics were designed to inhibit microbial growth. 
B)  Some xenobiotics are novel compounds that differ from naturally occurring chemicals, thus microorganisms have not yet evolved to effectively degrade them. 
C)  Only cometabolic microbial processes degrade xenobiotics. 
D)  Chlorinated compounds are so toxic that biodegradation is not possible. 
A)  Xenobiotics were designed to inhibit microbial growth. 
B)  Some xenobiotics are novel compounds that differ from naturally occurring chemicals, thus microorganisms have not yet evolved to effectively degrade them. 
C)  Only cometabolic microbial processes degrade xenobiotics. 
D)  Chlorinated compounds are so toxic that biodegradation is not possible.

Question 20

Bioremediation of uranium depends on

Accepted Answer

A)  fermentation and oxidation. 
B)  methanogens. 
C)  metal-reducing bacteria. 
D)  metal-oxidizing bacteria. 
A)  fermentation and oxidation. 
B)  methanogens. 
C)  metal-reducing bacteria. 
D)  metal-oxidizing bacteria.

Exam 21: Microbiology of the Built Environment

Water disinfection agents such as chlorine can easily inactivate viruses.

Microbes are sometimes used in secondary treatment of wastewater to

What chemical initiates the formation of acid mine drainage when pyrite is not disposed of properly?

Compare the operation and function of a trickling filter system and activated sludge.

Opportunistic pathogens such as Legionella,Pseudomonas,and Mycobacterium species have the ability to grow within ________,which may enhance their ability to survive in water distribution systems.

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

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

The production of ________ by ________ is thought to be a major contributor to the biodeterioration of stone building materials.

Aerobic secondary treatment is usually best for ________ wastewater.

Effluent water is wastewater

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

Which statement BEST describes sewage and wastewater?

The use of ________ to treat drinking water,which began in 1913,reduces the incidence of waterborne diseases.

Water leaving an efficient wastewater treatment facility ideally has a biochemical oxygen demand (BOD)between ________ units.

For water to be considered safe to drink,it MUST be treated with four distinct methods.

Microbial plastics are composed of

Which microorganisms commonly thrive in drinking water distribution systems and how might they impact human health?

Inorganic pollutants such as metals and radionuclides can be completely destroyed through bioremediation.

Why are some xenobiotics biodegraded slower than crude oil and petroleum products?

Bioremediation of uranium depends on

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

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

The production of by is thought to be a major contributor to the biodeterioration of stone building materials.