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Physical and Chemical Agents

Physical and Chemical Agents
Which of the following substances can sterilize?

Ethylene oxide
Chlorine
Alcohol
Cetylpyridinium chloride

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Physical and Chemical Agents
The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the

thermal death time
decimal reduction time
thermal death temperature
thermal death point

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Physical and Chemical Agents
If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?

Acidophile
Mesophile
Obligate Anaerobe
Obligate Aerobe

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Physical and Chemical Agents
The organisms retained in the fluids filtered by Seitz filter is

None of these
Staphylococcus
Proteus
Clostridium

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Physical and Chemical Agents
Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have

high concentration of solutes
toxic alkaline chemicals
low pH
insufficient nutrients

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Physical and Chemical Agents
Which of the following does not kill endospores?

Incineration
Pasteurization
Autoclave
Hot air sterilization

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