AORN Periop 101 Final Exam TEST BANK (2026 /
2027) Expected 250+ Questions and Revised
Correct Answers. with 100% Guarantee Pass
1. When opening a sterile package, the first flap should
be opened:
A. Toward the body
B. Away from the body
C. To the right side
D. To the left side
Answer: B. Away from the body
Rationale: Opening the first flap away from the body
prevents the unsterile arm/hand from passing over the
sterile field.
2. Sterile team members should keep their hands in sight
and at or above waist level to:
A. Prevent fatigue
B. Avoid contamination from unsterile surfaces
1
,C. Improve surgical precision
D. Increase circulation
Answer: B. Avoid contamination from unsterile surfaces
Rationale: Below-waist and behind-back areas are
considered unsterile; keeping hands visible prevents
inadvertent contamination.
3. The recommended minimum steam sterilization
exposure time for wrapped instruments at 250°F (121°C)
in a gravity displacement sterilizer is:
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. 60 minutes
Answer: C. 30 minutes
Rationale: Gravity displacement steam sterilizers require
at least 30 minutes at 121°C for wrapped items; flash
sterilization times differ.
2
,4. A biologic indicator for steam sterilization contains:
A. Bacillus stearothermophilus
B. Bacillus atrophaeus
C. Geobacillus stearothermophilus
D. Both A and C
Answer: D. Both A and C (Geobacillus stearothermophilus
is the current name)
Rationale: G. stearothermophilus is the standard
biological indicator for steam sterilization; it is highly
heat-resistant.
5. The sterile field is considered contaminated if it is left
unattended for:
A. 5 minutes
B. 10 minutes
C. 30 minutes
D. Any duration without observation
Answer: D. Any duration without observation
3
, Rationale: If no sterile person is watching the field,
contamination is assumed regardless of time.
6. When pouring sterile solutions into a basin on the
sterile field:
A. Hold the bottle with the label facing down
B. Pour from a height of 12 inches to create aeration
C. Avoid splashing by pouring slowly with label facing up
D. Recap the bottle and return it to the sterile field
Answer: C. Avoid splashing by pouring slowly with label
facing up
Rationale: Label up allows drips to fall on label (unsterile),
not into basin; recapping is not done on the field.
7. The minimum effective concentration (MEC) of ortho-
phthalaldehyde (OPA) for high-level disinfection is:
A. 0.05%
B. 0.3%
C. 0.55%
D. 2.4%
4
2027) Expected 250+ Questions and Revised
Correct Answers. with 100% Guarantee Pass
1. When opening a sterile package, the first flap should
be opened:
A. Toward the body
B. Away from the body
C. To the right side
D. To the left side
Answer: B. Away from the body
Rationale: Opening the first flap away from the body
prevents the unsterile arm/hand from passing over the
sterile field.
2. Sterile team members should keep their hands in sight
and at or above waist level to:
A. Prevent fatigue
B. Avoid contamination from unsterile surfaces
1
,C. Improve surgical precision
D. Increase circulation
Answer: B. Avoid contamination from unsterile surfaces
Rationale: Below-waist and behind-back areas are
considered unsterile; keeping hands visible prevents
inadvertent contamination.
3. The recommended minimum steam sterilization
exposure time for wrapped instruments at 250°F (121°C)
in a gravity displacement sterilizer is:
A. 5 minutes
B. 15 minutes
C. 30 minutes
D. 60 minutes
Answer: C. 30 minutes
Rationale: Gravity displacement steam sterilizers require
at least 30 minutes at 121°C for wrapped items; flash
sterilization times differ.
2
,4. A biologic indicator for steam sterilization contains:
A. Bacillus stearothermophilus
B. Bacillus atrophaeus
C. Geobacillus stearothermophilus
D. Both A and C
Answer: D. Both A and C (Geobacillus stearothermophilus
is the current name)
Rationale: G. stearothermophilus is the standard
biological indicator for steam sterilization; it is highly
heat-resistant.
5. The sterile field is considered contaminated if it is left
unattended for:
A. 5 minutes
B. 10 minutes
C. 30 minutes
D. Any duration without observation
Answer: D. Any duration without observation
3
, Rationale: If no sterile person is watching the field,
contamination is assumed regardless of time.
6. When pouring sterile solutions into a basin on the
sterile field:
A. Hold the bottle with the label facing down
B. Pour from a height of 12 inches to create aeration
C. Avoid splashing by pouring slowly with label facing up
D. Recap the bottle and return it to the sterile field
Answer: C. Avoid splashing by pouring slowly with label
facing up
Rationale: Label up allows drips to fall on label (unsterile),
not into basin; recapping is not done on the field.
7. The minimum effective concentration (MEC) of ortho-
phthalaldehyde (OPA) for high-level disinfection is:
A. 0.05%
B. 0.3%
C. 0.55%
D. 2.4%
4
