Physical and Chemical Agents

 

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Physical and Chemical Agents

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Question 1
Preservation of foods by using salts and sugars works by
A
raising pH
B
lowering osmotic pressure
C
creating a hypertonic environment
D
creating a hypotonic environment


Question 2
The time in minutes at a specific temperature needed to kill a population of cells is the
A
decimal reduction time
B
thermal death point
C
thermal death temperature
D
F value


Question 3
Which of the following articles can be sterilized in an autoclave?
A
Gloves
B
Culture media
C
Dressing material
D
All of these


Question 4
Which of the following skin disinfectant(s) is/are most frequently used?
A
Isopropyl alcohol
B
Ethyl alcohol
C
Both (a) and (b)
D
none of these


Question 5
Which of the following is bactericidal?
A
Membrane filtration
B
Ionizing radiation
C
Freeze-drying
D
Deep freezing


There are 5 questions to complete.

 

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