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Physical and Chemical Agents

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

Staphylococcus
Clostridium
Proteus
None of these

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Physical and Chemical Agents
Which of the following is sterilized with the help of glutaraldehyde?

Bronchoscopes
All of these
Cystoscopes
Thermometers

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Physical and Chemical Agents
Which is the most important surface active disinfectants?

Non-ionic compounds
Amphoteric compounds
Anionic compounds
Cationic compounds

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Physical and Chemical Agents
Media containing spores and thermolabile constituents are sterilized by

UV radiation
pasteurization
tyndalization
dry heat

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

Aqueous glutaraldehyde for 10 hours
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

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Physical and Chemical Agents
The time required to kill 90% of the microorganisms in a sample at a specific temperature is the

decimal reduction time
D value
thermal death point
F value

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