lOMoARcPSD| 54339004
CRCST EXAM QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTION LATEST UPDATED
2025
Classification for Sterilization Packaging:
✔✔ Class II Medical Devices (those presenting a potential risk)
Packaging used for steam sterilization must be capable of withstanding high temperatures
of:
✔✔ 250°F - 275°F (121°C - 135°C)
Process in which a device is actively subjected to moving air; Ex items being sterilized
with ethylene oxide gas:
✔✔ Aeration
Microorganism that requires the presence of air or oxygen for growth:
✔✔ Aerobe
Packaging choices for dry heat sterilization must be able to tolerate:
✔✔ 2-3 hours exposure time and temperature of 320°F - 400°F (160°C - 204°C)
Packaging choices for gas plasma sterilization must be able to tolerate:
✔✔ A deep vacuum draw without absorbing the sterilant, interrupting the cycle, or damaging
the contents.
Broad term describing a wide variety of plain-weave cotton/polyester fabrics having
approximately 140 threads per square inch:
✔✔ Muslin
The condition that arises when steam is at a temperature which exceeds that of saturated
steam at the same pressure:
✔✔ Superheating
All linen packaging materials should be held at:
✔✔ Room temperature (64°F to 72°F; 18°C to 22°C) and at a relative humidity ranging from
35% to 70% for a minimum of two hours prior to sterilization.
A non-woven packaging material which is the most popular flat wrap:
✔✔ SMS (spunbond-meltblown-spunbond)
, lOMoARcPSD| 54339004
Sterility Maintenance Covers:
✔✔ Should be at least 2 to 3 mils thick. The over-wrap should be clearly marked as a "dust
cover" or "protective wrap" to prevent its use as a part of the sterile field.
All packaging material should be held at:
✔✔ Room temperature (67°F to 72°F; 18°C to 22°C) and at a relative humidity ranging from
35% to 70% for a minimum of two hours before sterilization.
ANSI/AAMI ST77 recommends a maximum weight of for containerized instrument sets:
✔✔ 25 pounds
Sterility (time-related):
✔✔ A package is considered sterile until a specific expiration date is reached.
Sterility (event-related):
✔✔ Items are considered sterile unless the integrity of the packaging is compromised
(damaged) or suspected of being compromised (damage) regardless of the sterilization date.
This sometimes is referred to as ERS (Event-Related Sterility).
Point of Use Processing:
✔✔ That which allows when a medical device is processed immediately before use, and/or
close to the patient area.
Flash sterilization:
✔✔ The process by which unwrapped instruments are sterilized for immediate use when an
emergency situation arises.
AAMI:
✔✔ Association for the Advancement of Medical Instrumentation.
AORN:
✔✔ Association of peri-Operative Registered Nurses.
Class 5 (chemical integrators):
✔✔ Integrating indicators designed to react to all critical parameters over a specified range of
sterilization cycles.
Geobacillus Stearothermophilus:
✔✔ Highly resistant but relatively harmless nonpathogenic microorganism used to challenge
steam and dry heat sterilizers.
CRCST EXAM QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTION LATEST UPDATED
2025
Classification for Sterilization Packaging:
✔✔ Class II Medical Devices (those presenting a potential risk)
Packaging used for steam sterilization must be capable of withstanding high temperatures
of:
✔✔ 250°F - 275°F (121°C - 135°C)
Process in which a device is actively subjected to moving air; Ex items being sterilized
with ethylene oxide gas:
✔✔ Aeration
Microorganism that requires the presence of air or oxygen for growth:
✔✔ Aerobe
Packaging choices for dry heat sterilization must be able to tolerate:
✔✔ 2-3 hours exposure time and temperature of 320°F - 400°F (160°C - 204°C)
Packaging choices for gas plasma sterilization must be able to tolerate:
✔✔ A deep vacuum draw without absorbing the sterilant, interrupting the cycle, or damaging
the contents.
Broad term describing a wide variety of plain-weave cotton/polyester fabrics having
approximately 140 threads per square inch:
✔✔ Muslin
The condition that arises when steam is at a temperature which exceeds that of saturated
steam at the same pressure:
✔✔ Superheating
All linen packaging materials should be held at:
✔✔ Room temperature (64°F to 72°F; 18°C to 22°C) and at a relative humidity ranging from
35% to 70% for a minimum of two hours prior to sterilization.
A non-woven packaging material which is the most popular flat wrap:
✔✔ SMS (spunbond-meltblown-spunbond)
, lOMoARcPSD| 54339004
Sterility Maintenance Covers:
✔✔ Should be at least 2 to 3 mils thick. The over-wrap should be clearly marked as a "dust
cover" or "protective wrap" to prevent its use as a part of the sterile field.
All packaging material should be held at:
✔✔ Room temperature (67°F to 72°F; 18°C to 22°C) and at a relative humidity ranging from
35% to 70% for a minimum of two hours before sterilization.
ANSI/AAMI ST77 recommends a maximum weight of for containerized instrument sets:
✔✔ 25 pounds
Sterility (time-related):
✔✔ A package is considered sterile until a specific expiration date is reached.
Sterility (event-related):
✔✔ Items are considered sterile unless the integrity of the packaging is compromised
(damaged) or suspected of being compromised (damage) regardless of the sterilization date.
This sometimes is referred to as ERS (Event-Related Sterility).
Point of Use Processing:
✔✔ That which allows when a medical device is processed immediately before use, and/or
close to the patient area.
Flash sterilization:
✔✔ The process by which unwrapped instruments are sterilized for immediate use when an
emergency situation arises.
AAMI:
✔✔ Association for the Advancement of Medical Instrumentation.
AORN:
✔✔ Association of peri-Operative Registered Nurses.
Class 5 (chemical integrators):
✔✔ Integrating indicators designed to react to all critical parameters over a specified range of
sterilization cycles.
Geobacillus Stearothermophilus:
✔✔ Highly resistant but relatively harmless nonpathogenic microorganism used to challenge
steam and dry heat sterilizers.
