Question 1

Formalin (37% formaldehyde) is used for

Accepted Answer

A)   antisepsis.
B)   disinfection.
C)   sterilization.
D)   sanitization.
E)   both disinfection and sterilization.F) C) and E)
G) A) and E)

Question 2

The process of incineration is used for

Accepted Answer

A)   sterilization.
B)   degerming.
C)   disinfection.
D)   sanitization.
E)   both disinfection and sanitization.F) A) and D)
G) A) and B)

Question 3

Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?

Accepted Answer

A)   it is inexpensive.
B)   it is stable during storage.
C)   it is harmless to humans.
D)   it only arrests growth of vegetative cells.
E)   it acts quickly.F) B) and D)
G) A) and B)

Question 4

Ultraviolet light penetrates (more/less)effectively than gamma rays.

Accepted Answer

less

Question 5

Refrigeration is an effective germicidal method.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is the most difficult to inactivate?

Accepted Answer

A)   enveloped viruses
B)   fungus spores
C)   bacterial endospores
D)   nonenveloped viruses
E)   protozoan cystsF) A) and B)
G) A) and C)

Question 7

The (endospores/cysts/prions)are the infectious agents most resistant to antimicrobial agents or processes.

Accepted Answer

The answer of The (endospores/cysts/prions)are the infectious agents most resistant...

Question 8

Which of the following is bacteriostatic?

Accepted Answer

A)   heating in an oven at 171°C for an hour
B)   freezing below 0°C
C)   filtration
D)   autoclaving
E)   flash pasteurizationF) D) and E)
G) C) and D)

Question 9

Elements such as iodine,chlorine,and bromine are examples of (oxidizers/halogens/metals),which are the basis for many effective antimicrobial agents.

Accepted Answer

The answer of Elements such as iodine,chlorine,and bromine are examples...

Question 10

Which of the following is used for microbial control in fresh fruits and vegetables?

Accepted Answer

A)   X rays
B)   ultraviolet light
C)   electron beams
D)   microwaves
E)   gamma raysF) D) and E)
G) C) and D)

Question 11

The amount of time needed to sterilize materials using moist heat is (more/less)than the time needed to sterilize using dry heat.

Accepted Answer

The answer of The amount of time needed to sterilize...

Question 12

The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of

Accepted Answer

A)   fungi.
B)   viruses.
C)   bacteria.
D)   prions.
E)   all microbes.F) A) and B)
G) None of the above

Question 13

Aseptic means

Accepted Answer

A)   sterile.
B)   free of all microbes.
C)   clean.
D)   sanitized.
E)   free of pathogens.F) A) and C)
G) A) and B) E

Question 14

Which of the following can be used to disinfect air?

Accepted Answer

A)   HEPA filters
B)   ethylene oxide
C)   ultraviolet light
D)   both HEPA filters and ultraviolet light
E)   both ethylene oxide and ultraviolet lightF) C) and D)
G) A) and B)

Question 15

Removal of microbes from the skin is antisepsis.

Accepted Answer

A) True 
 B)False

Question 16

Desiccation,a time-honored method of preserving food,is effective because the

Accepted Answer

A)   heat of the process kills microbes.
B)   freezing step of the process kills microbes.
C)   salt concentration is too low to support metabolic function.
D)   UV light used in the process of sun drying penetrates effectively.
E)   water content is too low to support metabolic function.F) None of the above
G) D) and E)

Question 17

Which of the following antimicrobial agents is the most toxic to humans?

Accepted Answer

A)   70% alcohol
B)   ethylene oxide
C)   quaternary ammonium compounds
D)   chloramines
E)   iodophorsF) All of the above
G) A) and D)

Question 18

Disinfectants that damage membranes include

Accepted Answer

A)   alcohol.
B)   phenolics.
C)   iodine.
D)   hydrogen peroxide.
E)   both alcohol and phenolics.F) C) and D)
G) A) and B) E

Question 19

Slow freezing is more damaging to microbial cells than quick freezing.

Accepted Answer

A) True 
 B)False

Question 20

Protozoan cysts are resistant to many disinfection methods.

Accepted Answer

A) True 
 B)False

Exam 9: Controlling Microbial Growth in the Environment

Formalin (37% formaldehyde) is used for

Correct AnswerverifiedShow Answer

The process of incineration is used for

Correct AnswerverifiedShow Answer

Which of the following is NOT a desirable characteristic of an ideal antimicrobial agent?

Correct AnswerverifiedShow Answer

Ultraviolet light penetrates (more/less)effectively than gamma rays.

Correct Answerverifiedless

Refrigeration is an effective germicidal method.

Correct AnswerverifiedShow Answer

Which of the following is the most difficult to inactivate?

Correct AnswerverifiedShow Answer

The (endospores/cysts/prions)are the infectious agents most resistant to antimicrobial agents or processes.

Correct AnswerverifiedShow Answer

Which of the following is bacteriostatic?

Correct AnswerverifiedShow Answer

Elements such as iodine,chlorine,and bromine are examples of (oxidizers/halogens/metals),which are the basis for many effective antimicrobial agents.

Correct AnswerverifiedShow Answer

Which of the following is used for microbial control in fresh fruits and vegetables?

Correct AnswerverifiedShow Answer

The amount of time needed to sterilize materials using moist heat is (more/less)than the time needed to sterilize using dry heat.

Correct AnswerverifiedShow Answer

The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of

Correct AnswerverifiedShow Answer

Aseptic means

Correct AnswerverifiedE

Which of the following can be used to disinfect air?

Correct AnswerverifiedShow Answer

Removal of microbes from the skin is antisepsis.

Correct AnswerverifiedShow Answer

Desiccation,a time-honored method of preserving food,is effective because the

Correct AnswerverifiedShow Answer

Which of the following antimicrobial agents is the most toxic to humans?

Correct AnswerverifiedShow Answer

Disinfectants that damage membranes include

Correct AnswerverifiedE

Slow freezing is more damaging to microbial cells than quick freezing.

Correct AnswerverifiedShow Answer

Protozoan cysts are resistant to many disinfection methods.

Correct AnswerverifiedShow Answer

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