Question 1

Dry heat

Accepted Answer

A)   is less efficient than moist heat.
B)   cannot sterilize.
C)   includes tyndallization.
D)   is used in devices called autoclaves.
E)   will sterilize at 121°C for 15 minutes.F) B) and E)
G) B) and D)

Question 2

Microbiological contaminants are best described as

Accepted Answer

A)   unwanted microbes present on or in a substance.
B)   any and all microbes present on or in a substance.
C)   pathogenic microbes present on or in a substance.
D)   vegetative microbes present on or in a substance.E) All of the above
F) A) and D)

Question 3

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is

Accepted Answer

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

Question 4

For each item listed below, select a sterilant that you feel is the most suitable and effective for that item. Discuss why you selected each sterilant.

Accepted Answer

A) plastic Petri dishes to be used for n...

Question 5

__________ or steam sterilization is the process by which steam is heated under pressure to sterilize objects.

Accepted Answer

The answer of __________ or steam sterilization is the process...

Question 6

Discuss the purpose and level of control achieved by pasteurization. Compare the flash and batch methods.

Accepted Answer

Pasteurization is a process used to kill...

Question 7

All the following are correct about detergents, except

Accepted Answer

A)   they are polar molecules that act as surfactants.
B)   the most effective ones are positively charged.
C)   in low concentrations they are bacteriostatic.
D)   they are ineffective against the tuberculosis bacteria.
E)   they are active in the presence of organic matter.F) A) and E)
G) A) and B)

Question 8

Moist heat damages microorganisms by

Accepted Answer

A)   oxidation of cellular components.
B)   damaging the phospholipid bilayer.
C)   damaging the cells nucleic acids.
D)   denaturing and coagulating cellular proteins.E) A) and B)
F) C) and D)

Question 9

All of the following are phenols or phenolics, except

Accepted Answer

A)   lysol.
B)   hexachlorophene.
C)   triclosan.
D)   cresols.
E)   chloramines.F) C) and D)
G) B) and C)

Question 10

Moist heat is more efficient at killing microbes and is effective at lower temperatures or shorter exposure times than dry heat.

Accepted Answer

A) True 
 B)False

Question 11

Bacteriocidal agents are sterilants.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following microbial forms have the highest resistance to physical and chemical controls?

Accepted Answer

A)   naked viruses
B)   protozoan cysts
C)   fungal spores
D)   bacterial endospores
E)   yeastF) A) and B)
G) C) and D)

Question 13

The process that destroys or removes all microorganisms and microbial forms including bacterial endospores is

Accepted Answer

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

Question 14

Which method of microbial control destroys microorganisms by oxidation of cells?

Accepted Answer

A)   steam autoclave
B)   use of glutaraldehyde
C)   use of UV radiation
D)   incinerationE) A) and B)
F) A) and C)

Question 15

All of the following are benefits of food irradiation, except

Accepted Answer

A)   it can kill bacterial pathogens on the food.
B)   it can kill insects on the food.
C)   it can inhibit the sprouting of white potatoes.
D)   it can reduce the number of food-borne deaths each year.
E)   it makes the food less nutritious.F) D) and E)
G) All of the above

Question 16

Which of the following is not used as an antiseptic?

Accepted Answer

A)   iodophor
B)   chlorhexidine
C)   3% hydrogen peroxide
D)   ethyl alcohol
E)   aqueous glutaraldehydeF) A) and D)
G) B) and E)

Question 17

_____ filters are widely used to provide a flow of sterile air to hospital rooms.

Accepted Answer

The answer of _____ filters are widely used to provide...

Question 18

Which is mismatched?

Accepted Answer

A)   sodium hypochlorite-chlorine
B)   iodophor-iodine
C)   benzalkoniumchloride-quaternary ammonium compound
D)   chlorhexidine-alcohol
E)   formalin-formaldehydeF) B) and C)
G) A) and C)

Question 19

Using toilet bowl cleaner and nonionizing radiation on inanimate surfaces only removes or kills vegetative bacteria. The term that best describes this action is

Accepted Answer

A)   sterilization.
B)   disinfection.
C)   antisepsis.
D)   degermation.E) A) and D)
F) None of the above

Question 20

All of the following are correct about food irradiation, except

Accepted Answer

A)   food is not made radioactive by the process.
B)   the World Health Organization does not endorse this process.
C)   it is approved in the U.S. for beef, chicken, and pork.
D)   it can lead to a longer shelf life for the irradiated food.
E)   no irradiated food can be sold without clear labeling.F) A) and B)
G) None of the above

Exam 11: Physical and Chemical Agents for Microbial Control

For each item listed below, select a sterilant that you feel is the most suitable and effective for that item. Discuss why you selected each sterilant.

Correct AnswerverifiedA) plastic Petri dishes to be used for n...View AnswerShow Answer

All of the following are benefits of food irradiation, except

Correct AnswerverifiedShow Answer

All of the following are phenols or phenolics, except

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The process that destroys or removes all microorganisms and microbial forms including bacterial endospores is

Correct AnswerverifiedShow Answer

Which of the following is not used as an antiseptic?

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Using toilet bowl cleaner and nonionizing radiation on inanimate surfaces only removes or kills vegetative bacteria. The term that best describes this action is

Correct AnswerverifiedShow Answer

Dry heat

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Which method of microbial control destroys microorganisms by oxidation of cells?

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Microbiological contaminants are best described as

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All of the following are correct about food irradiation, except

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__________ or steam sterilization is the process by which steam is heated under pressure to sterilize objects.

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Which is mismatched?

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Moist heat damages microorganisms by

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Bacteriocidal agents are sterilants.

Correct AnswerverifiedShow Answer

_____ filters are widely used to provide a flow of sterile air to hospital rooms.

Correct AnswerverifiedShow Answer

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is

Correct AnswerverifiedShow Answer

Discuss the purpose and level of control achieved by pasteurization. Compare the flash and batch methods.

Correct AnswerAnswered by ExamLex AIPasteurization is a process used to kill...View AnswerShow Answer

Moist heat is more efficient at killing microbes and is effective at lower temperatures or shorter exposure times than dry heat.

Correct AnswerverifiedShow Answer

Which of the following microbial forms have the highest resistance to physical and chemical controls?

Correct AnswerverifiedShow Answer

All the following are correct about detergents, except

Correct AnswerverifiedShow Answer

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Pasteurization is a process used to kill...
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