CNOR 2025 EXAM WITH QUESTIONS AND 100% CORRECT ANSWERS
Two Types of Steam Sterilization - ANSWER - -Pre-Vac Autoclave/Dynamic Air Removal
-Gravity Displacement
PreVac settings - ANSWER - 270-276
3 min (NON porous instruments/regular instruments)
4 min (POROUS or LUMEN instruments, heavy plastic, rubber, wooden handles, poole suction)
PreVac/Dynamic Air Removal setting for porous (heavy plastic, rubber, wood handels) or lumen
instruments (poole suction/channels) - ANSWER - 270-276 for 4 min
PreVac/Dynamic Air Removal setting for Non Porous instruments - ANSWER - 270-276 for 3 min
How does PreVac/Dynamic Air Removal autoclave work? - ANSWER - -Sucks air out of chamber with a
VACCUM then steam is released and snaps down onto inst/trays.
-DRAINS MUST BE CLEAN
-Most common. Most effective.
Gravity Displacement Autoclave settings - ANSWER - 270-276
3 min: NonPorous/reg instruments
10 min: Porous/Lumens
,Gravity Displacement autoclave settings for porous/lumens - ANSWER - 270-276 10 min
Gravity Displacement autoclave settings for NonPorous/reg inst - ANSWER - 270-276 3 min
How does Gravity Displacement autoclave work? - ANSWER - Steam pushes air down to a thermometer
in the drain, the air exits the chamber, drain closes, cycle starts.
-Not great for trays or packages.
-Rarely used.
Both PreVac/Dynamic Air Removal and Gravity time and temperature requirements are for the
instrument and autoclave only.
For certain containers/systems such as One Tray system or containers with lids: - ANSWER - I will
follow the manufacturers instructions!
3 ways to avoid condensation with steam sterilization items: - ANSWER - - Allow airflow between trays
and pkgs and all the way around.
-Remove loads immediately (don't crack the door to cool).
-Don't place items on cooling racks or solid surfaces (can place on lined surfaces).
How many classes of Chemical Integrators? - ANSWER - 6
What kind of chemical integrators react to heat? - ANSWER - Class 1 Chemical Indicator
-Reacts to HEAT only. Verifies exposure only.
-Tape-Locks-Filter dots
PAgE | 1
,What kind of chemical integrator is an External Indicator? - ANSWER - Class 1 Chemical Indicator
External Indicator that reacts to Heat only
-Tape-Locks-Filter dots
What class of Chemical Indicator is the Bowie Dick, and what does it react to? - ANSWER - -Class 2
Chemical Indicator
-Reacts to PRESSURE and ONLY indicates a VACUUM was created.
-Used only with PreVac/Dynamic Air Removal cycles
What class of chemical indicator measures
-Single Parameter?
-Multi Parameter? - ANSWER - -Class 3 Single (Ex: quality of steam)
-Class 4 Multi (Ex: Time+Temp)
-Class 3&4 are usually made by the manufacturer.
Which class of chemical indicator is the most common all inclusive integrator? - ANSWER - Class 5
Chemical Integrator/Indicator is the
-most common
-covers ALL parameters (time/temp/pressure/steam quality)
-ALL INCLUSIVE
-internal
-placed on each layer and in corner (most challenging area)
-used for implants
PAgE | 2
, Which chemical indicator is used for implants? - ANSWER - Class 5 Integrator
Which class of chemical indicator is used for a particular tray/cycle? - ANSWER - Class 6 Emulating
Integrator
-internal
-all inclusive for a SPECIFIC cycle
-made by mfr for a specific cycle OR tray
What does -integrator- mean? - ANSWER - ALL inclusive. ALL parameters have been met.
-Class 5 + Class 6
-No indicator or integrator promises sterility
Immediate Use settings:
What makes it different? - ANSWER - 270 10 min + BIO + Class 5 integrator
-Uses a rigid sterilization container with a lid.
-Must do same decontam process.
-Immediate Use has a shorter dry time.
-Items can be WET and it's OK
-NEVER use linens/wraps/packages in Immed Use
What has to be done for ALL steam sterilizers (PreVac/Dynamic, Gravity, IUS) - ANSWER - -Daily QCs
with BIOLOGICALS to check for spores.
-Keep a sterilization log.
PAgE | 3
Two Types of Steam Sterilization - ANSWER - -Pre-Vac Autoclave/Dynamic Air Removal
-Gravity Displacement
PreVac settings - ANSWER - 270-276
3 min (NON porous instruments/regular instruments)
4 min (POROUS or LUMEN instruments, heavy plastic, rubber, wooden handles, poole suction)
PreVac/Dynamic Air Removal setting for porous (heavy plastic, rubber, wood handels) or lumen
instruments (poole suction/channels) - ANSWER - 270-276 for 4 min
PreVac/Dynamic Air Removal setting for Non Porous instruments - ANSWER - 270-276 for 3 min
How does PreVac/Dynamic Air Removal autoclave work? - ANSWER - -Sucks air out of chamber with a
VACCUM then steam is released and snaps down onto inst/trays.
-DRAINS MUST BE CLEAN
-Most common. Most effective.
Gravity Displacement Autoclave settings - ANSWER - 270-276
3 min: NonPorous/reg instruments
10 min: Porous/Lumens
,Gravity Displacement autoclave settings for porous/lumens - ANSWER - 270-276 10 min
Gravity Displacement autoclave settings for NonPorous/reg inst - ANSWER - 270-276 3 min
How does Gravity Displacement autoclave work? - ANSWER - Steam pushes air down to a thermometer
in the drain, the air exits the chamber, drain closes, cycle starts.
-Not great for trays or packages.
-Rarely used.
Both PreVac/Dynamic Air Removal and Gravity time and temperature requirements are for the
instrument and autoclave only.
For certain containers/systems such as One Tray system or containers with lids: - ANSWER - I will
follow the manufacturers instructions!
3 ways to avoid condensation with steam sterilization items: - ANSWER - - Allow airflow between trays
and pkgs and all the way around.
-Remove loads immediately (don't crack the door to cool).
-Don't place items on cooling racks or solid surfaces (can place on lined surfaces).
How many classes of Chemical Integrators? - ANSWER - 6
What kind of chemical integrators react to heat? - ANSWER - Class 1 Chemical Indicator
-Reacts to HEAT only. Verifies exposure only.
-Tape-Locks-Filter dots
PAgE | 1
,What kind of chemical integrator is an External Indicator? - ANSWER - Class 1 Chemical Indicator
External Indicator that reacts to Heat only
-Tape-Locks-Filter dots
What class of Chemical Indicator is the Bowie Dick, and what does it react to? - ANSWER - -Class 2
Chemical Indicator
-Reacts to PRESSURE and ONLY indicates a VACUUM was created.
-Used only with PreVac/Dynamic Air Removal cycles
What class of chemical indicator measures
-Single Parameter?
-Multi Parameter? - ANSWER - -Class 3 Single (Ex: quality of steam)
-Class 4 Multi (Ex: Time+Temp)
-Class 3&4 are usually made by the manufacturer.
Which class of chemical indicator is the most common all inclusive integrator? - ANSWER - Class 5
Chemical Integrator/Indicator is the
-most common
-covers ALL parameters (time/temp/pressure/steam quality)
-ALL INCLUSIVE
-internal
-placed on each layer and in corner (most challenging area)
-used for implants
PAgE | 2
, Which chemical indicator is used for implants? - ANSWER - Class 5 Integrator
Which class of chemical indicator is used for a particular tray/cycle? - ANSWER - Class 6 Emulating
Integrator
-internal
-all inclusive for a SPECIFIC cycle
-made by mfr for a specific cycle OR tray
What does -integrator- mean? - ANSWER - ALL inclusive. ALL parameters have been met.
-Class 5 + Class 6
-No indicator or integrator promises sterility
Immediate Use settings:
What makes it different? - ANSWER - 270 10 min + BIO + Class 5 integrator
-Uses a rigid sterilization container with a lid.
-Must do same decontam process.
-Immediate Use has a shorter dry time.
-Items can be WET and it's OK
-NEVER use linens/wraps/packages in Immed Use
What has to be done for ALL steam sterilizers (PreVac/Dynamic, Gravity, IUS) - ANSWER - -Daily QCs
with BIOLOGICALS to check for spores.
-Keep a sterilization log.
PAgE | 3
