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Physical and Chemical Agents

Physical and Chemical Agents
Which of the following is most effective for sterilizing mattresses and plastic petri plates?

Glutaraldehyde
Chlorine
Ultraviolet radiation
Ethylene oxide

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

Chlorine
Ethylene oxide
Cetylpyridinium chloride
Alcohol

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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
thermal death point
thermal death temperature
decimal reduction time

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Physical and Chemical Agents
Bactericidal concentration of phenol is

1%
0.75%
0.5%
0.25%

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Physical and Chemical Agents
One drawback to the use of ultraviolet light as a sterilizing agent is its

failure to kill microbes in a closed environment
failure to kill microbes located in the center of an object
failure to bacterial spores
failure to kill bacteria

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Physical and Chemical Agents
Which of the following methods will not sterilize?

Dry heat at 171°C for 1 to 2 hours
121°C at 15 lb/in pressure for 15 to 20 minutes
100°C boiling water for 30 minutes
Aqueous glutaraldehyde for 10 hours

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