Question 1

Which is mismatched?

Accepted Answer

A)  sodium hypochlorite - chlorine
B)  iodophor - iodine
C)  benzalkonium chloride - quaternary ammonium compound
D)  Merthiolate - silver
E)  formalin - formaldehydeF) A) and B)
G) A) and C)

Question 2

The minimum sterilizing conditions in a steam autoclave are:

Accepted Answer

A)  121° C at 15 psi for 15 minutes.
B)  63° C for 30 minutes.
C)  160° C for 2 hours.
D)  71.6° C for 15 seconds.
E)  100° C for 30 minutes.F) D) and E)
G) A) and B)

Question 3

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) B) and E)
G) All of the above

Question 4

Which of the following is not used as an antiseptic?

Accepted Answer

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

Question 5

Disinfection of beverages, such as apple juice, milk, and wine, is optimally achieved by:

Accepted Answer

A)  pasteurization.
B)  chlorination.
C)  moist heat autoclave.
D)  filtration.
E)  boiling water.F) D) and E)
G) B) and D)

Question 6

Explain why boiling water is considered disinfection, not a sterilization method.List three materials commonly disinfected by boiling water.

Accepted Answer

Boiling water is considered a disinfecti...

Question 7

Using toilet bowl cleaner and nonionizing radiation to non-animate 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)  None of these are correctF) A) and B)
G) None of the above

Question 8

All of the following are methods of disinfection or sterilization, except:

Accepted Answer

A)  gamma radiation.
B)  dry oven.
C)  lyophilization.
D)  triclosan.
E)  ethanol.F) All of the above
G) B) and C)

Question 9

All of the following pertain to hypochlorites, except:

Accepted Answer

A)  release hypochlorous acid in solution.
B)  cause denaturation of enzymes.
C)  found in iodophors.
D)  used to disinfect dairy, restaurant, and medical equipment.
E)  found in common household bleach.F) All of the above
G) B) and E)

Question 10

Which of the following chemicals is a disinfectant for soft contact lenses?

Accepted Answer

A)  hydrogen peroxide
B)  alcohol
C)  hexachlorophene
D)  glutaraldehyde
E)  hypochoritesF) A) and B)
G) B) and E)

Question 11

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) B) and E)
G) A) and E)

Question 12

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) All of the above
G) C) and E)

Question 13

Which common hospital pathogen is able to grow abundantly in soap dishes?

Accepted Answer

A)  Escherichia coli
B)  Pseudomonas
C)  Hemophilus influenzae
D)  Mycobacteria tuberculosis
E)  SalmonellaF) B) and D)
G) C) and E)

Question 14

A method for sterilizing milk, called _____ temperature treatment, uses 134° C for 1 to 2 seconds.

Accepted Answer

The answer of A method for sterilizing milk, called _____...

Question 15

Which of the following types of agents targets protein conformation?

Accepted Answer

A)  Detergents
B)  Ultraviolet light
C)  Alcohol
D)  Hydrogen peroxide
E)  Crystal violetF) A) and D)
G) A) and B)

Question 16

The presence of organic matter such as saliva and pus can interfere with the actions of disinfectants.

Accepted Answer

A) True 
 B)False

Question 17

When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.

Accepted Answer

A) True 
 B)False

Question 18

The sterilizing gas used in a special chamber is:

Accepted Answer

A)  ethylene oxide.
B)  iodophor.
C)  glutaraldehyde.
D)  formaldehyde.
E)  chlorine dioxide.F) A) and D)
G) B) and D)

Question 19

Filtration is an effective method to remove microbes from air and liquids.

Accepted Answer

A) True 
 B)False

Question 20

_____ radiation excites atoms to a higher energy state within molecules such as DNA that then leads to the formation of pyrimidine dimers.

Accepted Answer

The answer of _____ radiation excites atoms to a higher...

Exam 11: Physical and Chemical Agents for Microbial Control

Which of the following types of agents targets protein conformation?

Correct AnswerverifiedShow Answer

All of the following pertain to hypochlorites, except:

Correct AnswerverifiedShow Answer

A method for sterilizing milk, called _____ temperature treatment, uses 134° C for 1 to 2 seconds.

Correct AnswerverifiedShow Answer

The minimum sterilizing conditions in a steam autoclave are:

Correct AnswerverifiedShow Answer

_____ radiation excites atoms to a higher energy state within molecules such as DNA that then leads to the formation of pyrimidine dimers.

Correct AnswerverifiedShow Answer

The sterilizing gas used in a special chamber is:

Correct AnswerverifiedShow Answer

The presence of organic matter such as saliva and pus can interfere with the actions of disinfectants.

Correct AnswerverifiedShow Answer

Which of the following is not used as an antiseptic?

Correct AnswerverifiedShow Answer

Using toilet bowl cleaner and nonionizing radiation to non-animate surfaces only removes or kills vegetative bacteria.The term that best describes this action is:

Correct AnswerverifiedShow Answer

All the following are correct about detergents, except:

Correct AnswerverifiedShow Answer

Which common hospital pathogen is able to grow abundantly in soap dishes?

Correct AnswerverifiedShow Answer

Which of the following chemicals is a disinfectant for soft contact lenses?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Disinfection of beverages, such as apple juice, milk, and wine, is optimally achieved by:

Correct AnswerverifiedShow Answer

All of the following are methods of disinfection or sterilization, except:

Correct AnswerverifiedShow Answer

Explain why boiling water is considered disinfection, not a sterilization method.List three materials commonly disinfected by boiling water.

Correct AnswerAnswered by ExamLex AIBoiling water is considered a disinfecti...View AnswerShow Answer

Filtration is an effective method to remove microbes from air and liquids.

Correct AnswerverifiedShow Answer

All of the following are benefits of food irradiation, except:

Correct AnswerverifiedShow Answer

Which is mismatched?

Correct AnswerverifiedShow Answer

When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.

Correct AnswerverifiedShow Answer

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Boiling water is considered a disinfecti...
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