Autoclave uses which condition to sterilize?

Autoclave uses which condition to sterilize?

• A. Moist heat at 121°C (250°F)
• B. Ultraviolet light
• C. Dry heat
• D. Chemical vapors

Answer: (A)

Autoclave sterilization relies on steam under pressure, delivering moist heat to safety-kill microorganisms. The standard setting uses moist heat at about 121°C (250°F) under roughly 15 psi of pressure for a short period (often 15 minutes for many loads). The steam’s moisture transfers heat very efficiently and causes rapid coagulation and denaturation of proteins in microbes, including spores, which is why this method is so effective for a wide range of materials. The pressure keeps the water in the steam phase at the higher temperature, allowing steam to penetrate wrapped or hollow items and dense loads. Ultraviolet light isn’t used for autoclaving because it doesn’t penetrate beyond outer surfaces well and is unreliable for sterilizing complex or packed items. Dry heat sterilization needs even higher temperatures and longer exposure times since it relies on heat alone without moisture. Chemical vapor sterilization uses vaporized chemicals rather than steam, so it’s a different process altogether.

Autoclave sterilization relies on steam under pressure, delivering moist heat to safety-kill microorganisms. The standard setting uses moist heat at about 121°C (250°F) under roughly 15 psi of pressure for a short period (often 15 minutes for many loads). The steam’s moisture transfers heat very efficiently and causes rapid coagulation and denaturation of proteins in microbes, including spores, which is why this method is so effective for a wide range of materials. The pressure keeps the water in the steam phase at the higher temperature, allowing steam to penetrate wrapped or hollow items and dense loads.

Ultraviolet light isn’t used for autoclaving because it doesn’t penetrate beyond outer surfaces well and is unreliable for sterilizing complex or packed items. Dry heat sterilization needs even higher temperatures and longer exposure times since it relies on heat alone without moisture. Chemical vapor sterilization uses vaporized chemicals rather than steam, so it’s a different process altogether.