Question 1

A septic tank will function effectively without a leach field.

Accepted Answer

A) True 
 B)False

Question 2

Potable water is unfit for consumption or recreation because of the high levels of microbial contaminants present.

Accepted Answer

A) True 
 B)False

Question 3

Canada geese have become a major source of Giardia and Cryptosporidium contamination of soil and fresh water.

Accepted Answer

A) True 
 B)False

Question 4

Chlorination alone will usually suffice to inactivate viruses present in drinking water.

Accepted Answer

A) True 
 B)False

Question 5

The membrane filter technique can be used in all waters and has completely replaced the MPN technique.

Accepted Answer

A) True 
 B)False

Question 6

If a leach field floods it becomes anoxic and effective treatment ceases.

Accepted Answer

A) True 
 B)False

Question 7

It is usually beneficial to add nitrogen when one attempts to stimulate hydrocarbon degradation in the ocean.

Accepted Answer

A) True 
 B)False

Question 8

Additions of a remediating microbe to natural environments can be more successful if

Accepted Answer

A)  the microorganism is added together with a microhabitat that gives the organism physical protection.
B)  the microorganism is inoculated onto a leaf,root,or a seed.
C)  the microorganism is provided with nutrients.
D)  all of the choicesE) B) and D)
F) A) and D)

Question 9

Purification of waters while generating power and providing energy for monitoring environmental processes is an application of microbial fuel cells.

Accepted Answer

A) True 
 B)False

Question 10

Sewage treatment that involves horizontal flow in an agitated aeration tank is referred to as

Accepted Answer

A)  lagooning.
B)  activated sludge treatment.
C)  trickling filter processing.
D)  endogenous respiration.E) A) and B)
F) B) and D)

Question 11

Activated sludge is used in which sewage treatment step?

Accepted Answer

A)  primary
B)  secondary
C)  tertiary
D)  all of the choicesE) None of the above
F) A) and B)

Question 12

Coliforms and fecal coliform are often differentiated based on their responses to

Accepted Answer

A)  temperature.
B)  salinity.
C)  pressure.
D)  heavy metals.E) All of the above
F) C) and D) A

Question 13

The acceleration of microbiological processes by the addition of known active microorganisms to soils,waters,or other complex systems is called __________.

Accepted Answer

The answer of The acceleration of microbiological processes by the...

Question 14

The inability of the "superbug" to successfully clean up oil spills in the ocean environment was mostly a matter of its inability to survive and compete in that environment.

Accepted Answer

A) True 
 B)False

Question 15

Cryptosporidium has recently become of concern because it is hard to remove from water supplies.

Accepted Answer

A) True 
 B)False  True

Question 16

Indicator organisms are added to drinking water to test whether the purification process is being carried out effectively.

Accepted Answer

A) True 
 B)False

Question 17

Methods used to remove or destroy viruses from drinking water include

Accepted Answer

A)  coagulation and filtration.
B)  chemical oxidation and high pH.
C)  photooxidation.
D)  all of the choicesE) All of the above
F) A) and D) D

Question 18

Secondary treatment of sewage involves the use of which type of process?

Accepted Answer

A)  Biological removal of dissolved organic matter.
B)  Physical/chemical removal of insoluble particulate materials.
C)  Biological removal of inorganic nutrients.
D)  Virus removal/inactivation.E) A) and C)
F) A) and D)

Question 19

Potable water

Accepted Answer

A)  requires boiling to make it safe to drink.
B)  is not suitable for human consumption.
C)  is suitable for human consumption.
D)  requires chemical or biological treatment to remove heavy metals.E) All of the above
F) A) and C)

Question 20

In the testing of water for coliforms,the presumptive test involves detection of

Accepted Answer

A)  gas production in a lactose broth medium.
B)  sheen production on a selective medium.
C)  a gram-negative nonspore-forming rod.
D)  all of the choicesE) A) and C)
F) B) and C)

Exam 43: Applied Environmental Microbiology

A septic tank will function effectively without a leach field.

Correct AnswerverifiedShow Answer

Potable water is unfit for consumption or recreation because of the high levels of microbial contaminants present.

Correct AnswerverifiedShow Answer

Canada geese have become a major source of Giardia and Cryptosporidium contamination of soil and fresh water.

Correct AnswerverifiedShow Answer

Chlorination alone will usually suffice to inactivate viruses present in drinking water.

Correct AnswerverifiedShow Answer

The membrane filter technique can be used in all waters and has completely replaced the MPN technique.

Correct AnswerverifiedShow Answer

If a leach field floods it becomes anoxic and effective treatment ceases.

Correct AnswerverifiedShow Answer

It is usually beneficial to add nitrogen when one attempts to stimulate hydrocarbon degradation in the ocean.

Correct AnswerverifiedShow Answer

Additions of a remediating microbe to natural environments can be more successful if

Correct AnswerverifiedShow Answer

Purification of waters while generating power and providing energy for monitoring environmental processes is an application of microbial fuel cells.

Correct AnswerverifiedShow Answer

Sewage treatment that involves horizontal flow in an agitated aeration tank is referred to as

Correct AnswerverifiedShow Answer

Activated sludge is used in which sewage treatment step?

Correct AnswerverifiedShow Answer

Coliforms and fecal coliform are often differentiated based on their responses to

Correct AnswerverifiedA

The acceleration of microbiological processes by the addition of known active microorganisms to soils,waters,or other complex systems is called __________.

Correct AnswerverifiedShow Answer

The inability of the "superbug" to successfully clean up oil spills in the ocean environment was mostly a matter of its inability to survive and compete in that environment.

Correct AnswerverifiedShow Answer

Cryptosporidium has recently become of concern because it is hard to remove from water supplies.

Correct AnswerverifiedTrue

Indicator organisms are added to drinking water to test whether the purification process is being carried out effectively.

Correct AnswerverifiedShow Answer

Methods used to remove or destroy viruses from drinking water include

Correct AnswerverifiedD

Secondary treatment of sewage involves the use of which type of process?

Correct AnswerverifiedShow Answer

Potable water

Correct AnswerverifiedShow Answer

In the testing of water for coliforms,the presumptive test involves detection of

Correct AnswerverifiedShow Answer

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A

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True

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D

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