Question 1

Which of the following requires aerobic conditions?

Accepted Answer

A)  water treatment 
B)  sludge digestion 
C)  secondary sewage treatment 
D)  primary sewage treatment 
E)  nitrogen fixation 
A)  water treatment 
B)  sludge digestion 
C)  secondary sewage treatment 
D)  primary sewage treatment 
E)  nitrogen fixation C

Question 2

Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

Accepted Answer

A)  decrease. 
B)  increase. 
C)  stay the same. 
D)  The answer cannot be determined based on the information provided. 
A)  decrease. 
B)  increase. 
C)  stay the same. 
D)  The answer cannot be determined based on the information provided. B

Question 3

In water treatment, the purpose of flocculation is to remove microbes, such as Giardia and
Cryptosporidium.

Accepted Answer

A) True 
 B)False  False

Question 4

Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

Accepted Answer

A)  anaerobic sludge digestion 
B)  primary sewage treatment 
C)  secondary sewage treatment 
D)  tertiary sewage treatment 
E)  water treatment 
A)  anaerobic sludge digestion 
B)  primary sewage treatment 
C)  secondary sewage treatment 
D)  tertiary sewage treatment 
E)  water treatment

Question 5

Filtration to remove protozoa occurs in

Accepted Answer

A)  tertiary sewage treatment. 
B)  secondary sewage treatment. 
C)  water treatment. 
D)  primary sewage treatment. 
E)  anaerobic sludge digestion. 
A)  tertiary sewage treatment. 
B)  secondary sewage treatment. 
C)  water treatment. 
D)  primary sewage treatment. 
E)  anaerobic sludge digestion.

Question 6

The bacteriological safety of drinking water is determined by testing water samples for the presence of human pathogens.

Accepted Answer

A) True 
 B)False

Question 7

For the biogeochemical cycles of the following elements, which does NOT have an atmospheric cycle?

Accepted Answer

A)  nitrogen 
B)  phosphorus 
C)  carbon 
D)  sulfur 
A)  nitrogen 
B)  phosphorus 
C)  carbon 
D)  sulfur

Question 8

Figure 27.2
  
-Where are photosynthetic bacteria most likely to be found in Figure 27.2?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  a and b 
E)  b and c 
A)  a 
B)  b 
C)  c 
D)  a and b 
E)  b and c

Question 9

Untreated sewage is released into a river. Which of the following statements is FALSE?

Accepted Answer

A)  The untreated sewage increases the BOD. 
B)  The untreated sewage is a health hazard. 
C)  The untreated sewage kills bacteria. 
D)  The untreated sewage decreases the dissolved oxygen. 
E)  All of the statements are true. 
A)  The untreated sewage increases the BOD. 
B)  The untreated sewage is a health hazard. 
C)  The untreated sewage kills bacteria. 
D)  The untreated sewage decreases the dissolved oxygen. 
E)  All of the statements are true.

Question 10

In the early 1900s, cities such as Philadelphia reduced the incidence of typhoid fever by

Accepted Answer

A)  using tertiary water treatment systems. 
B)  filtering municipal drinking water through sand-bed filters. 
C)  isolating human carriers. 
D)  requiring residents to boil drinking water. 
E)  mass vaccination of residents. 
A)  using tertiary water treatment systems. 
B)  filtering municipal drinking water through sand-bed filters. 
C)  isolating human carriers. 
D)  requiring residents to boil drinking water. 
E)  mass vaccination of residents.

Question 11

Zoogloea form flocculent masses in

Accepted Answer

A)  tertiary sewage treatment. 
B)  anaerobic sludge digestion. 
C)  water treatment. 
D)  primary sewage treatment. 
E)  activated sludge digestion. 
A)  tertiary sewage treatment. 
B)  anaerobic sludge digestion. 
C)  water treatment. 
D)  primary sewage treatment. 
E)  activated sludge digestion.

Question 12

Sedimentation of sludge occurs in

Accepted Answer

A)  anaerobic sludge digestion. 
B)  primary sewage treatment. 
C)  secondary sewage treatment. 
D)  tertiary sewage treatment. 
E)  water treatment. 
A)  anaerobic sludge digestion. 
B)  primary sewage treatment. 
C)  secondary sewage treatment. 
D)  tertiary sewage treatment. 
E)  water treatment.

Question 13

All of the following are habitats for extremophiles EXCEPT

Accepted Answer

A)  an acid mine wash. 
B)  the topmost portions of the Atlantic Ocean. 
C)  a salt-evaporating pond. 
D)  100°C water. 
E)  inside rock. 
A)  an acid mine wash. 
B)  the topmost portions of the Atlantic Ocean. 
C)  a salt-evaporating pond. 
D)  100°C water. 
E)  inside rock.

Question 14

Bioremediation involves the use of microbes to degrade or detoxify pollutants.

Accepted Answer

A) True 
 B)False

Question 15

Aerobic respiration occurs in

Accepted Answer

A)  secondary sewage treatment. 
B)  tertiary sewage treatment. 
C)  anaerobic sludge digestion. 
D)  water treatment. 
E)  primary sewage treatment. 
A)  secondary sewage treatment. 
B)  tertiary sewage treatment. 
C)  anaerobic sludge digestion. 
D)  water treatment. 
E)  primary sewage treatment.

Question 16

Which of the following is NOT a symbiotic pair of organisms?

Accepted Answer

A)  onions and arbuscules 
B)  elk and rumen bacteria 
C)  bean plant and Rhizobium 
D)  orchid and mycorrhizae 
E)  sulfur and Thiobacillus 
A)  onions and arbuscules 
B)  elk and rumen bacteria 
C)  bean plant and Rhizobium 
D)  orchid and mycorrhizae 
E)  sulfur and Thiobacillus

Question 17

Residual chlorine must be maintained in

Accepted Answer

A)  anaerobic sludge digestion. 
B)  primary sewage treatment. 
C)  secondary sewage treatment. 
D)  tertiary sewage treatment. 
E)  water treatment. 
A)  anaerobic sludge digestion. 
B)  primary sewage treatment. 
C)  secondary sewage treatment. 
D)  tertiary sewage treatment. 
E)  water treatment.

Question 18

What stage of sewage treatment produces methane?

Accepted Answer

A)  tertiary treatment 
B)  primary treatment 
C)  secondary treatment 
D)  sludge digestion 
E)  None of the stages of sewage treatment produce methane. 
A)  tertiary treatment 
B)  primary treatment 
C)  secondary treatment 
D)  sludge digestion 
E)  None of the stages of sewage treatment produce methane.

Question 19

Which of the following is NOT characteristic of fecal coliforms?

Accepted Answer

A)  lactose-fermenting 
B)  rod-shaped 
C)  pathogenic 
D)  gram-negative 
E)  non-spore forming 
A)  lactose-fermenting 
B)  rod-shaped 
C)  pathogenic 
D)  gram-negative 
E)  non-spore forming

Question 20

The guano deposited by seabirds is used a source for which of the following fertilizer components?

Accepted Answer

A)  nitrate 
B)  carbonate 
C)  potassium 
D)  sulfate 
E)  phosphate 
A)  nitrate 
B)  carbonate 
C)  potassium 
D)  sulfate 
E)  phosphate

Exam 27: Environmental Microbiology

Which of the following requires aerobic conditions?

Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

In water treatment, the purpose of flocculation is to remove microbes, such as Giardia and Cryptosporidium.

Which wastewater treatment process is responsible for removal of most of the BOD in sewage?

Filtration to remove protozoa occurs in

The bacteriological safety of drinking water is determined by testing water samples for the presence of human pathogens.

For the biogeochemical cycles of the following elements, which does NOT have an atmospheric cycle?

Figure 27.2 -Where are photosynthetic bacteria most likely to be found in Figure 27.2?

Untreated sewage is released into a river. Which of the following statements is FALSE?

In the early 1900s, cities such as Philadelphia reduced the incidence of typhoid fever by

Zoogloea form flocculent masses in

Sedimentation of sludge occurs in

All of the following are habitats for extremophiles EXCEPT

Bioremediation involves the use of microbes to degrade or detoxify pollutants.

Aerobic respiration occurs in

Which of the following is NOT a symbiotic pair of organisms?

Residual chlorine must be maintained in

What stage of sewage treatment produces methane?

Which of the following is NOT characteristic of fecal coliforms?

The guano deposited by seabirds is used a source for which of the following fertilizer components?

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Viruses, Viroids, and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Disease of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Innate Immunity: Nonspecific Defenses of the Host

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