Question 1

Hydrogen peroxide can be used to sterilize instruments such as endoscopes.

Accepted Answer

A) True 
 B)False

Question 2

Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube?

Accepted Answer

A)   Ultraviolet (germicidal)  light
B)   Gamma rays
C)   121°C at 15 psi for 15 minutes
D)   160°C for 2 hours
E)   All of the choices would kill Mycobacterium in a culture tube.F) C) and D)
G) None of the above

Question 3

Heavy metals such as silver, mercury and copper are effective antimicrobials due to their ability to bind to the regulatory site of enzymes, thus acting as an irreversible non-competitive inhibitor.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following types of control agents would be used to achieve sterility?

Accepted Answer

A)   Virucide
B)   Bactericide
C)   Germicide
D)   Sporicide
E)   FungicideF) A) and E)
G) A) and B)

Question 5

The process that destroys or removes all microorganisms and microbial forms including bacterial endospores on inanimate objects is ________.

Accepted Answer

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

Question 6

When comparing the Bunsen burner and a hot-air oven, the Bunsen burner is more versatile since it can sterilize a wide range of materials, including plastics, cottons and oils.

Accepted Answer

A) True 
 B)False

Question 7

Pasteurization will make milk sterile.

Accepted Answer

A) True 
 B)False

Question 8

The advantage of using ethylene oxide as a sterilant over moist heat sterilization in an autoclave is that ________.

Accepted Answer

A)   it kills endospores, whereas the autoclave will only kill vegetative cells
B)   it is much safer for humans to work with ethylene oxide than to operate an autoclave
C)   it can be used to sterilize plastics that would melt in an autoclave
D)   All of the choices are reasons to preferentially use ethylene oxide as a sterilantE) None of the above
F) A) and B)

Question 9

The lowest temperature needed to kill all microbes in 10 minutes is the ________.

Accepted Answer

A)   thermal death point (TDP) 
B)   thermal death time (TDT) 
C)   sporicidal time
D)   death phase point
E)   None of the choices are correctF) C) and D)
G) A) and E)

Question 10

The method of removing vegetative life forms from living surfaces is termed ________.

Accepted Answer

A)   antisepsis
B)   disinfection
C)   sterilization
D)   decontamination
E)   degermingF) All of the above
G) A) and C)

Question 11

Which of the following items are typically irradiated in order to kill microbes?

Accepted Answer

A)   Meats like ground beef and pork
B)   Human tissues such as heart valves and skin
C)   Operating room air
D)   Surgical gloves
E)   All of the choices are correct.F) C) and E)
G) B) and D)

Question 12

Disinfection of beverages such as apple juice, milk, wine is optimally achieved by ________.

Accepted Answer

A)   pasteurization
B)   chlorination
C)   moist heat autoclave
D)   hydrogen peroxide
E)   boiling waterF) B) and C)
G) A) and B)

Question 13

The chemical agent that produces highly toxic and reactive free radicals is ________.

Accepted Answer

A)   cidex
B)   cationic detergents
C)   hydrogen peroxide
D)   chlorhexidine
E)   iodophorsF) C) and E)
G) C) and D)

Question 14

Ethylene oxide is a sterilizing gas.

Accepted Answer

A) True 
 B)False

Question 15

Beginning Fall 2017, the FDA banned the use of phenolic compounds, such as triclosan, in consumer soaps and lotions. This is due to ________.

Accepted Answer

A)   increased microbial resistance to these chemicals
B)   they only work against bacterial cells, not fungi or viruses
C)   the inefficiency of phenolics as antimicrobials
D)   a worldwide shortage of triclosanE) None of the above
F) All of the above

Question 16

One disadvantage to using ortho-phthalaldehyde vs. glutaraldehyde as an antimicrobial agent is ________.

Accepted Answer

A)   increased cost
B)   decreased efficacy
C)   decreased safety
D)   increased toxicityE) A) and C)
F) C) and D)

Question 17

The RN cleanses the urethral opening with an iodine swab. Which of the following terms most appropriately describes this method of microbial control?

Accepted Answer

A)   Disinfection
B)   Antisepsis
C)   Decontamination
D)   SterilizationE) None of the above
F) A) and B)

Question 18

Most microbial contaminants of food are killed at freezing temperatures.

Accepted Answer

A) True 
 B)False

Question 19

What instrument is most effective for pressure-temperature sterilization?

Accepted Answer

A)   Oven
B)   Autoclave
C)   Water bath
D)   Bunsen burner
E)   IncubatorF) A) and E)
G) All of the above

Question 20

After preparing the patient's skin, the RN brushes against the sterile field with her arm. What is the most appropriate action by the RN?

Accepted Answer

A)   Continue the procedure and place the catheter.
B)   Clean the catheter with alcohol, and then continue the procedure.
C)   Discard the sterile field and obtain new supplies.
D)   Clean the catheter with iodine, and then continue the procedure.E) B) and C)
F) A) and D)

Exam 9: Physical and Chemical Control of Microbes

Ethylene oxide is a sterilizing gas.

Correct AnswerverifiedShow Answer

The lowest temperature needed to kill all microbes in 10 minutes is the ________.

Correct AnswerverifiedShow Answer

Disinfection of beverages such as apple juice, milk, wine is optimally achieved by ________.

Correct AnswerverifiedShow Answer

The RN cleanses the urethral opening with an iodine swab. Which of the following terms most appropriately describes this method of microbial control?

Correct AnswerverifiedShow Answer

Beginning Fall 2017, the FDA banned the use of phenolic compounds, such as triclosan, in consumer soaps and lotions. This is due to ________.

Correct AnswerverifiedShow Answer

After preparing the patient's skin, the RN brushes against the sterile field with her arm. What is the most appropriate action by the RN?

Correct AnswerverifiedShow Answer

One disadvantage to using ortho-phthalaldehyde vs. glutaraldehyde as an antimicrobial agent is ________.

Correct AnswerverifiedShow Answer

The process that destroys or removes all microorganisms and microbial forms including bacterial endospores on inanimate objects is ________.

Correct AnswerverifiedShow Answer

Pasteurization will make milk sterile.

Correct AnswerverifiedShow Answer

Which of the following items are typically irradiated in order to kill microbes?

Correct AnswerverifiedShow Answer

The chemical agent that produces highly toxic and reactive free radicals is ________.

Correct AnswerverifiedShow Answer

Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube?

Correct AnswerverifiedShow Answer

The advantage of using ethylene oxide as a sterilant over moist heat sterilization in an autoclave is that ________.

Correct AnswerverifiedShow Answer

The method of removing vegetative life forms from living surfaces is termed ________.

Correct AnswerverifiedShow Answer

When comparing the Bunsen burner and a hot-air oven, the Bunsen burner is more versatile since it can sterilize a wide range of materials, including plastics, cottons and oils.

Correct AnswerverifiedShow Answer

Heavy metals such as silver, mercury and copper are effective antimicrobials due to their ability to bind to the regulatory site of enzymes, thus acting as an irreversible non-competitive inhibitor.

Correct AnswerverifiedShow Answer

Hydrogen peroxide can be used to sterilize instruments such as endoscopes.

Correct AnswerverifiedShow Answer

What instrument is most effective for pressure-temperature sterilization?

Correct AnswerverifiedShow Answer

Which of the following types of control agents would be used to achieve sterility?

Correct AnswerverifiedShow Answer

Most microbial contaminants of food are killed at freezing temperatures.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified