CS CRCST Exam Prep
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Steam Cycle Parameter Quiz

The CRCST exam asks about steam cycles constantly: prevacuum vs gravity displacement, the daily Bowie-Dick test, altitude adjustments, wet pack rules. Drill 10 questions, get warm coaching on every answer, and pocket the memory anchors.

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Quick answers

What are the standard steam cycles?

Prevacuum (dynamic air removal): 132 C (270 F) for 4 minutes. Gravity displacement: 121 C (250 F) for 30 minutes at 15 psi, or 132 C (270 F) for 15 minutes. The device IFU always wins over textbook standards.

Why does the Bowie-Dick test exist?

It runs daily on prevacuum sterilizers, first cycle of the day, in an empty chamber. It detects air leaks and inadequate air removal, because trapped air blocks steam contact and lets microorganisms survive.

Is a wet pack sterile?

No. A wet pack is considered contaminated and must be reprocessed. Do not pull wet packs out of the chamber early; let them finish drying inside.

How does altitude change the cycle?

Higher altitude means lower atmospheric pressure, so water boils at a lower temperature and the steam is cooler. Facilities at altitude must lengthen the exposure time to reach the same kill.