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Physical and Chemical Agents

Physical and Chemical Agents
Ethylene oxide is used to destroy or kill which of the following microbes?

Fungi
Bacteria
Spores
All of these

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Physical and Chemical Agents
Which of the following is bactericidal?

Membrane filtration
Freeze-drying
Ionizing radiation
Deep freezing

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Physical and Chemical Agents
Which disinfectant would be most effective against Staphylococcus found in a blood spill?

Hexachlorophene
Phenol
Cetylpyridinium chloride
None of these

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Physical and Chemical Agents
Preservation of foods by using salts and sugars works by

creating a hypertonic environment
creating a hypotonic environment
raising pH
lowering osmotic pressure

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Physical and Chemical Agents
The time in minutes at a specific temperature needed to kill a population of cells is the

thermal death point
thermal death temperature
F value
decimal reduction time

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Physical and Chemical Agents
Which disinfectant was the most effective against Salmonella"?

Phenol
Merthiolate
Cetylpyridinium chloride
Hexachlorophene

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