CRCST Exam Prep {Practice Exercise 1} 2023 LATEST QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+

Dynamic air removal: exposure time for any wrapped item at 275 degrees. - CORRECT ANSWER 3 minutes What is the correct percentage of relative humidity for steam sterilization? - CORRECT ANSWER 97%-100% What are the 4 cycles of steam sterilization? - CORRECT ANSWER Conditioning, exposure, exhaust, drying Which low-temp sterilization method requires monitoring? - CORRECT ANSWER Ethylene oxide How does ethylene oxide kill microbes? - CORRECT ANSWER By a process called alkylation. How do ozone and hydrogen peroxide kill microbes? - CORRECT ANSWER By a process called oxidation. Discuss sterilization parameters for ethylene oxide (concentration, temp, humidity, exposure time, aeration time) - CORRECT ANSWER Concentration: 450-1200 mg/l Temp: 98-145 degrees F Exposure time: 1-6 hours Humidity: 40-80% Aeration time: 8-12 hours at 122-140 degrees F What is the microorganism of choice for ethylene oxide sterilization? - CORRECT ANSWER Bacillus atrophaeus What are the five phases of gas plasma sterilization? - CORRECT ANSWER Vacuum, injection, diffusion, plasma, vent