Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Vials of microorganisms that undergo the freeze-drying process called ________ will remain preserved and viable for years.

Accepted Answer

A)   desiccation
B)   flash freeze
C)   lyophilization
D)   pasteurization
E)   sterilizationF) C) and D)
G) A) and E)

Question 3

Which of the following represents the use of osmotic pressure as a microbial control method?

Accepted Answer

A)   Bleaching a kitchen counter
B)   Salting meat
C)   Rinsing a cut with Betadine
D)   Both bleaching a kitchen counter and rinsing a cut with Betadine are correct.E) B) and D)
F) None of the above

Question 4

Which of the following microbes are targeted by alcohol-based hand cleaners?

Accepted Answer

A)   Bacteria
B)   Viruses
C)   Fungi
D)   Bacteria, viruses, and fungiE) B) and D)
F) None of the above

Question 5

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

Accepted Answer

A)   Infrared
B)   Ultraviolet
C)   Gamma
D)   Particle
E)   IonizingF) B) and D)
G) A) and C)

Question 6

Bacteristatic agents kill bacterial cells.

Accepted Answer

A) True 
 B)False

Question 7

Prior to placement of the central venous line, the patient's skin is scrubbed with chlorhexidine. Which of the following microorganisms are targeted by this chemical agent?

Accepted Answer

A)   Bacteria
B)   Viruses
C)   Fungi
D)   Bacteria, viruses, and fungiE) C) and D)
F) B) and D)

Question 8

Pasteurization ________.

Accepted Answer

A)   kills all vegetative forms
B)   reduces the number of vegetative forms
C)   reduces the number of endospores
D)   increases food nutrient value
E)   None of the choices are correctF) C) and E)
G) All of the above

Question 9

Temperature and time must be considered when determining susceptibility of microbes to lethal conditions. At a specific temperature, the thermal death ________ can be determined, alternatively, the thermal death ________ can be assessed as the lowest temperature that will kill a test organism in 10 minutes.

Accepted Answer

A)   time; point
B)   point; time
C)   exposure, time
D)   point; exposureE) B) and C)
F) None of the above

Question 10

Following successful placement of the central venous line, the RN is diligent to prevent infection when accessing the catheter and administering medications. Which of the following actions should be completed prior to use of the line?

Accepted Answer

A)   Hand washing
B)   Disinfection of the access port with alcohol prior to use
C)   Application of gloves
D)   Hand washing, application of gloves, and disinfection of the access port with alcohol should all be completed prior to use of the line.E) All of the above
F) A) and D) D

Question 11

The removal of all life forms from inanimate objects is termed ________.

Accepted Answer

A)   antisepsis
B)   disinfection
C)   sterilization
D)   decontamination
E)   degermingF) A) and E)
G) A) and B) C

Question 12

The method of removing vegetative microbial life forms from inanimate objects is termed ________.

Accepted Answer

A)   antisepsis
B)   disinfection
C)   sterilization
D)   decontamination
E)   degermingF) A) and E)
G) A) and B) B

Question 13

Phenols are useful antimicrobial compounds in that they are effective against bacteria fungi and viruses, disrupting several cellular targets, however, they have been removed from many consumer products because of their high toxicity and propensity to select for resistant strains of microorganisms.

Accepted Answer

A) True 
 B)False

Question 14

Removal of moisture by dehydration is called ________.

Accepted Answer

A)   desiccation
B)   flash freeze
C)   lyophilization
D)   pasteurization
E)   sterilizationF) All of the above
G) A) and C)

Question 15

________ is a control method that removes microorganisms rather than inhibiting or killing them.

Accepted Answer

A)   Boiling
B)   Sterilization
C)   Radiation
D)   Filtration
E)   DisinfectionF) A) and D)
G) C) and E)

Question 16

Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ________.

Accepted Answer

A)   disinfection
B)   sterilization
C)   antisepsis
D)   sanitization
E)   ionizationF) A) and B)
G) C) and E)

Question 17

The RN prepares the patient for the sterile procedure. Which of the following statements made by the patient, best demonstrates understanding of the need for sterile equipment and aseptic procedures?

Accepted Answer

A)   Sterile equipment and aseptic procedures are utilized so there are no microorganisms introduced that could cause infection.
B)   Sterile equipment and aseptic procedures are utilized to reduce trauma to the urinary tract.
C)   Sterile equipment and aseptic procedures are utilized to protect the nurse from infection.
D)   Sterile equipment and aseptic procedures are utilized so that microorganisms on the skin that could cause infection are destroyed.E) None of the above
F) B) and C)

Question 18

The most efficient 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 minutesF) A) and E)
G) C) and E)

Question 19

Antimicrobial agents can target the cell wall by ________.

Accepted Answer

A)   blocking its synthesis
B)   digesting it
C)   inhibiting peptidoglycan synthesis
D)   All of the choices are correctE) A) and D)
F) B) and D)

Question 20

The RN practices proper handwashing technique when his hands are visibly dirty. Which of the following terms most appropriately describes the type of antimicrobial control provided by handwashing with germicidal soap and water?

Accepted Answer

A)   Sterilization
B)   Disinfection
C)   Decontamination
D)   AntisepsisE) A) and C)
F) B) and D)

Exam 9: Physical and Chemical Control of Microbes

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

Correct AnswerverifiedShow Answer

Vials of microorganisms that undergo the freeze-drying process called ________ will remain preserved and viable for years.

Correct AnswerverifiedShow Answer

Which of the following represents the use of osmotic pressure as a microbial control method?

Correct AnswerverifiedShow Answer

Which of the following microbes are targeted by alcohol-based hand cleaners?

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

Bacteristatic agents kill bacterial cells.

Correct AnswerverifiedShow Answer

Prior to placement of the central venous line, the patient's skin is scrubbed with chlorhexidine. Which of the following microorganisms are targeted by this chemical agent?

Correct AnswerverifiedShow Answer

Pasteurization ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Following successful placement of the central venous line, the RN is diligent to prevent infection when accessing the catheter and administering medications. Which of the following actions should be completed prior to use of the line?

Correct AnswerverifiedD

The removal of all life forms from inanimate objects is termed ________.

Correct AnswerverifiedC

The method of removing vegetative microbial life forms from inanimate objects is termed ________.

Correct AnswerverifiedB

Phenols are useful antimicrobial compounds in that they are effective against bacteria fungi and viruses, disrupting several cellular targets, however, they have been removed from many consumer products because of their high toxicity and propensity to select for resistant strains of microorganisms.

Correct AnswerverifiedShow Answer

Removal of moisture by dehydration is called ________.

Correct AnswerverifiedShow Answer

________ is a control method that removes microorganisms rather than inhibiting or killing them.

Correct AnswerverifiedShow Answer

Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ________.

Correct AnswerverifiedShow Answer

The RN prepares the patient for the sterile procedure. Which of the following statements made by the patient, best demonstrates understanding of the need for sterile equipment and aseptic procedures?

Correct AnswerverifiedShow Answer

The most efficient sterilizing conditions in a steam autoclave are ________.

Correct AnswerverifiedShow Answer

Antimicrobial agents can target the cell wall by ________.

Correct AnswerverifiedShow Answer

The RN practices proper handwashing technique when his hands are visibly dirty. Which of the following terms most appropriately describes the type of antimicrobial control provided by handwashing with germicidal soap and water?

Correct AnswerverifiedShow Answer

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