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Questions and Answers
What is the optimum bactericidal concentration of alcohol solutions in water?
What is the optimum bactericidal concentration of alcohol solutions in water?
- 30%–40%
- 10%–20%
- 40%–50%
- 60%–90% (correct)
What is the difference between sterilization and disinfection?
What is the difference between sterilization and disinfection?
- Sterilization uses chemicals, while disinfection uses heat.
- Sterilization destroys all microorganisms including spores, while disinfection kills many but not all microorganisms. (correct)
- Sterilization removes microbes that may cause disease, while disinfection destroys all microorganisms.
- Sterilization is only done by filtration, while disinfection is done by chemicals.
Which type of heat sterilization can be achieved through autoclaving?
Which type of heat sterilization can be achieved through autoclaving?
- Moist heat (correct)
- Dry heat
- Chemical
- Radiation
What is the primary mechanism of sterilization by heat?
What is the primary mechanism of sterilization by heat?
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What are the two variables primarily affecting the rate of killing of microorganisms?
What are the two variables primarily affecting the rate of killing of microorganisms?
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