Question 1

Ethylene oxide is ________.

Accepted Answer

A)   sporicidal
B)   only effective with high heat
C)   the active agent in household bleach
D)   used as an antiseptic against anaerobes
E)   a halogenF) C) and D)
G) A) and C)

Question 2

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

Accepted Answer

A)   pasteurization
B)   batch pasteurization
C)   flash pasteurization
D)   ultra high temperature
E)   None of the choices are correctF) A) and B)
G) B) and D)

Question 3

Of the six methods of controlling growth by physical means; heat, cold, desiccation, radiation, filtration and osmotic pressure, the only method that is capable of complete sterilization is radiation.

Accepted Answer

A) True 
 B)False

Question 4

All of the following disrupt the cytoplasmic membrane except ________.

Accepted Answer

A)   detergents
B)   quaternary ammonium compounds
C)   high concentration phenols
D)   iodineE) B) and D)
F) A) and C)

Question 5

Microbial death occurs when there is ________.

Accepted Answer

A)   no movement
B)   permanent loss of reproduction
C)   a change in appearance
D)   a decrease in size
E)   All of these occurF) A) and B)
G) A) and C)

Question 6

Which pair of physical control methods will achieve complete sterilization?

Accepted Answer

A)   Autoclaving and ionizing radiation
B)   Ultraviolet radiation and filtration
C)   Freezing and filtration
D)   Osmotic pressure and incineration
E)   Pasteurization and ultraviolet radiationF) A) and E)
G) C) and D)

Question 7

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 water, restaurant, and medical equipment
E)   found in common household bleachF) A) and D)
G) B) and E)

Question 8

All of the following are accurate statements concerning microbial control using dry heat except ________.

Accepted Answer

A)   it is the preferred method of control to sterilize cottons, plastics and paper
B)   it takes up to 4 hours to sterilize instruments in a hot-air oven, whereas the Bunsen burner will incinerate an inoculating loop almost immediately
C)   the Bunsen burner can achieve temperatures up to 1,870oC, whereas the hot-air oven reaches temperatures of up to 180oC
D)   while fast and effective, the Bunsen burner is limited to metals and glassware, whereas powders and oils can also be sterilized in the hot-air ovenE) A) and B)
F) All of the above

Question 9

The RN utilizes an alcohol-based hand cleanser with friction rub when his hands are not visibly dirty. Which of the following terms appropriately describes the type of antimicrobial control provided by alcohol-based hand cleansers?

Accepted Answer

A)   Sterilization
B)   Disinfection
C)   Decontamination
D)   AntisepsisE) None of the above
F) All of the above

Question 10

Each of the following is the target of antimicrobial agents except ________.

Accepted Answer

A)   cell walls
B)   cell membranes
C)   ribosomes
D)   cellular proteins
E)   cytoplasmF) C) and D)
G) A) and C)

Question 11

Agents that can denature microbial proteins include all of the following except ________.

Accepted Answer

A)   moist heat
B)   alcohol
C)   acids
D)   metallic ions
E)   X raysF) A) and B)
G) B) and E)

Question 12

________ is a halogen used in gaseous and liquid form for large-scale disinfection of drinking water and sewage.

Accepted Answer

A)   Iodine
B)   Chlorine
C)   Bromine
D)   Fluorine
E)   All of the choices are correct.F) C) and D)
G) D) and E)

Question 13

All of the following are disadvantages to using compounds containing heavy metals, except ________.

Accepted Answer

A)   they can only be taken in pill form, not applied as a lotion or ointment
B)   they may cause allergic reactions in susceptible individuals
C)   organisms can develop resistance to the compounds
D)   they are not effective against endospores
E)   they can be toxicF) C) and E)
G) A) and B)

Question 14

Which of the following factors will influence the action of antimicrobial agents?

Accepted Answer

A)   The number of microorganisms
B)   The kind of microorganisms
C)   Temperature and pH
D)   Mode and dosage of the agent
E)   All of these will influence the action.F) A) and D)
G) A) and E)

Question 15

To reduce the patient's risk of infection, the RN assists the physician with applying all of the following prior to the procedure except ________.

Accepted Answer

A)   sterile gloves
B)   clean gown
C)   cap
D)   maskE) A) and C)
F) B) and C)

Question 16

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 17

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) A) and C)

Question 18

Isopropyl alcohol wiped across a skin site can sterilize it.

Accepted Answer

A) True 
 B)False

Question 19

If chlorhexidine is unavailable for the procedure, which of the following chemical agents would also be appropriate as a topical antiseptic?

Accepted Answer

A)   2% iodine
B)   10% potassium iodide
C)   Formaldehyde
D)   PhenolE) B) and C)
F) B) and D)

Question 20

The alcohol wipe before an injection is an example of ________.

Accepted Answer

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

Exam 9: Physical and Chemical Control of Microbes

If chlorhexidine is unavailable for the procedure, which of the following chemical agents would also be appropriate as a topical antiseptic?

Correct AnswerverifiedShow Answer

All of the following pertain to hypochlorites except ________.

Correct AnswerverifiedShow Answer

Which of the following factors will influence the action of antimicrobial agents?

Correct AnswerverifiedShow Answer

Agents that can denature microbial proteins include all of the following except ________.

Correct AnswerverifiedShow Answer

Isopropyl alcohol wiped across a skin site can sterilize it.

Correct AnswerverifiedShow Answer

All of the following disrupt the cytoplasmic membrane except ________.

Correct AnswerverifiedShow Answer

To reduce the patient's risk of infection, the RN assists the physician with applying all of the following prior to the procedure except ________.

Correct AnswerverifiedShow Answer

Each of the following is the target of antimicrobial agents except ________.

Correct AnswerverifiedShow Answer

All of the following are accurate statements concerning microbial control using dry heat except ________.

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

All of the following are disadvantages to using compounds containing heavy metals, except ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The alcohol wipe before an injection is an example of ________.

Correct AnswerverifiedShow Answer

Which pair of physical control methods will achieve complete sterilization?

Correct AnswerverifiedShow Answer

Of the six methods of controlling growth by physical means; heat, cold, desiccation, radiation, filtration and osmotic pressure, the only method that is capable of complete sterilization is radiation.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Ethylene oxide is ________.

Correct AnswerverifiedShow Answer

________ is a halogen used in gaseous and liquid form for large-scale disinfection of drinking water and sewage.

Correct AnswerverifiedShow Answer

Microbial death occurs when there is ________.

Correct AnswerverifiedShow Answer

The RN utilizes an alcohol-based hand cleanser with friction rub when his hands are not visibly dirty. Which of the following terms appropriately describes the type of antimicrobial control provided by alcohol-based hand cleansers?

Correct AnswerverifiedShow Answer

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