CRCST Practice Exam 2025 – Complete Study Resource

Maintaining the proper temperature and exposure time is essential for achieving sterilization through dry heat methods. Dry heat sterilization operates on the principle of using high temperatures to destroy microorganisms, including bacterial spores, which are among the most resistant forms of life. Each type of sterilization has specific parameters that must be met to ensure efficacy, and for dry heat, these include both temperature and the duration of exposure.

Typically, dry heat sterilization requires higher temperatures—often around 320°F (160°C) for a minimum of 2 hours. If the temperature is too low or the exposure time is insufficient, the method will not effectively kill spores, leading to incomplete sterilization. Therefore, strictly adhering to the designated temperature and time is critical to achieving the desired sterilization outcome.

The other options, while important in the overall sterilization process, do not directly correlate with the effectiveness of dry heat sterilization itself. Proper cleaning of instruments is a necessary step to ensure that organic matter does not interfere with the sterilization process, but it does not directly address the mechanics of achieving sterilization under dry heat. Using distilled water is irrelevant to dry heat sterilization as it is not a part of the process, and ensuring items are pre-packed in sterile wraps pertains more