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Physical and Chemical Agents

Physical and Chemical Agents
Milk is pasteurized in batch method by keeping it at

72°C for 60 seconds
63°C for 30 minutes
73°C for 30 minutes
72°C for 6 minutes

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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?

10
50
1
5

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Physical and Chemical Agents
Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?

None of these
Minimum inhibitory concentration test
Capacity test
Phenol coefficient test

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

Hot air sterilization
Pasteurization
Incineration
Autoclave

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

Bronchoscopes
Thermometers
All of these
Cystoscopes

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Physical and Chemical Agents
Ethylene oxide is used to destroy or kill which of the following microbes?

All of these
Fungi
Bacteria
Spores

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