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Physical and Chemical Agents

Physical and Chemical Agents
Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as

none of these
inspissation
tyndallization
autoclaving

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Physical and Chemical Agents
Which of the following material is sterilized by heating at 160°C in a hot air oven for one hour?

All of these
Oils and jellies
All-glass syringes
Swab sticks

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Physical and Chemical Agents
Which of the following is a limitation of the autoclave?

It will destroy heat labile materials
It takes too long to sterilize
It lacks the ability to inactivate viruses
It lacks the ability to kill endospores

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Physical and Chemical Agents
Which of the following articles can be sterilized in an autoclave?

Dressing material
Culture media
Gloves
All of these

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Physical and Chemical Agents
Which of the following disinfectants act by disrupting microbial membranes?

Halogens
Heavy metals
Aldehydes
Cationic detergents

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

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

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