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Physical and Chemical Agents

Physical and Chemical Agents
The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as

pasteurization
sterilization
disinfection
antisepsis

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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
All-glass syringes
Oils and jellies
Swab sticks

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

Cetylpyridinium chloride
Merthiolate
Hexachlorophene
Phenol

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Physical and Chemical Agents
Which of the following skin disinfectant(s) is/are most frequently used?

Ethyl alcohol
Isopropyl alcohol
Both (a) and (b)
none of these

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

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

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Physical and Chemical Agents
If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound?

50
5
10
1

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