What is the key difference between disinfection and sterilization?
A
Disinfection kills spores; sterilization does not B
Sterilization removes all microbes, disinfection does not C
They are exactly the same D
Disinfection is stronger than sterilization
Analysis & Theory
Sterilization destroys all forms of microbial life, including spores.
Which method uses steam under pressure for sterilization?
A
Boiling B
Pasteurization C
Autoclaving D
Hot air oven
Analysis & Theory
Autoclaving is moist heat sterilization at 121°C and 15 psi.
Which of the following is a chemical disinfectant used on skin?
A
Formaldehyde B
Alcohol (70%) C
Ethylene oxide D
Gamma rays
Analysis & Theory
70% alcohol is a common antiseptic and disinfectant for skin and surfaces.
Which method is best for sterilizing heat-sensitive materials?
A
Autoclaving B
Dry heat oven C
Ethylene oxide gas D
Boiling
Analysis & Theory
Ethylene oxide gas sterilizes without heat, ideal for delicate instruments.
What type of radiation is used for sterilizing disposable medical items?
A
Infrared rays B
UV light C
Microwaves D
Gamma rays
Analysis & Theory
Gamma rays are used for sterilizing plastic syringes, gloves, and catheters.