Question 1

The shortest time required to kill all the microbes in a sample at a specified temperature is called 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 correct.F) None of the above
G) All of the above

Question 2

The compound that is an organic base containing chlorine and two phenolic rings and is used increasingly for handscrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is:

Accepted Answer

A)  carbolic acid.
B)  chlorhexidine.
C)  triclosan.
D)  formalin.
E)  quarternary ammonium compounds.F) A) and E)
G) A) and C)

Question 3

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

Accepted Answer

A) True 
 B)False

Question 4

Electrons are ejected from atoms in cells when organisms are exposed to:

Accepted Answer

A)  dessication.
B)  ultraviolet light.
C)  ethyl alcohol.
D)  hydrogen peroxide.
E)  gamma rays and X rays.F) B) and E)
G) A) and B)

Question 5

All of the following are correct about the autoclave, except:

Accepted Answer

A)  it is important not to overload the chamber.
B)  it is effective for sterilizing powders, oils, and waxy substances.
C)  the duration of the process depends on how full the chamber is.
D)  it is the temperature that kills the microbes, not the pressure by itself.
E)  sterilization is achieved when steam condenses against the objects in the chamber and raises their temperatures.F) A) and D)
G) B) and C)

Question 6

Bacteriostatic agents kill bacterial cells.

Accepted Answer

A) True 
 B)False

Question 7

_____ 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 8

Isopropyl alcohol wiped across a skin site can sterilize it.

Accepted Answer

A) True 
 B)False

Question 9

Sterilization is achieved by:

Accepted Answer

A)  flash pasteurization.
B)  hot water.
C)  boiling water.
D)  steam autoclave.
E)  All of the choices are correct.F) C) and E)
G) A) and E)

Question 10

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 B)
G) A) and E)

Question 11

Chlorine compounds remain stable and effective in the presence of excess organic matter.

Accepted Answer

A) True 
 B)False

Question 12

Historically, which of the following was instilled into the eyes of newborn infants to prevent gonococcal infections?

Accepted Answer

A)  triclosan
B)  formaldehyde
C)  phenol
D)  silver nitrate
E)  mercurochromeF) C) and D)
G) A) and B)

Question 13

Aniline dyes like crystal violet have antimicrobial activity particularly against gram positive bacteria and some fungi.

Accepted Answer

A) True 
 B)False

Exam 11: Physical and Chemical Agents for Microbial Control

The shortest time required to kill all the microbes in a sample at a specified temperature is called the:

Correct Answer
verified

Electrons are ejected from atoms in cells when organisms are exposed to:

Correct Answer
verified

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

Correct Answer
verified

The compound that is an organic base containing chlorine and two phenolic rings and is used increasingly for handscrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is:

Correct Answer
verified

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

Correct Answer
verified

Historically, which of the following was instilled into the eyes of newborn infants to prevent gonococcal infections?

Correct Answer
verified

Isopropyl alcohol wiped across a skin site can sterilize it.

Correct Answer
verified

Aniline dyes like crystal violet have antimicrobial activity particularly against gram positive bacteria and some fungi.

Correct Answer
verified

Bacteriostatic agents kill bacterial cells.

Correct Answer
verified

Sterilization is achieved by:

Correct Answer
verified

Chlorine compounds remain stable and effective in the presence of excess organic matter.

Correct Answer
verified

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

Correct Answer
verified

All of the following are correct about the autoclave, except:

Correct Answer
verified

Exam 11: Physical and Chemical Agents for Microbial Control

The shortest time required to kill all the microbes in a sample at a specified temperature is called the:

Correct AnswerverifiedShow Answer

Electrons are ejected from atoms in cells when organisms are exposed to:

Correct AnswerverifiedShow Answer

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

Correct AnswerverifiedShow Answer

The compound that is an organic base containing chlorine and two phenolic rings and is used increasingly for handscrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Historically, which of the following was instilled into the eyes of newborn infants to prevent gonococcal infections?

Correct AnswerverifiedShow Answer

Isopropyl alcohol wiped across a skin site can sterilize it.

Correct AnswerverifiedShow Answer

Aniline dyes like crystal violet have antimicrobial activity particularly against gram positive bacteria and some fungi.

Correct AnswerverifiedShow Answer

Bacteriostatic agents kill bacterial cells.

Correct AnswerverifiedShow Answer

Sterilization is achieved by:

Correct AnswerverifiedShow Answer

Chlorine compounds remain stable and effective in the presence of excess organic matter.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

All of the following are correct about the autoclave, except:

Correct AnswerverifiedShow Answer

Correct Answer
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