AST Certification Practice Exam | Expert Verified Actual
Questions & Answers for Guaranteed Pass | Newest Upd - 200
Questions
This exam covers core principles of surgical technology including aseptic technique, sterilization, surgical
anatomy, patient safety, and perioperative care. Questions require synthesis of concepts and application to
complex clinical scenarios. It contains 200 multiple-choice questions, each with four distractors and a fully
worked rationale that explains why the keyed answer is correct. Content is organized into 1 focused section:
General. Targeted learning outcomes include: Apply principles of aseptic technique to prevent surgical site
infections; Analyze sterilization methods and their indications; Integrate knowledge of anatomy and physiology
into surgical procedures; Evaluate patient safety measures in the perioperative environment. Every item has been
reviewed for clinical accuracy, current guidelines, and clarity so that students can study with confidence and
self-correct as they work through the bank. Use it as a high-yield review immediately before the exam, or as a
structured practice tool during the unit - the rationales double as concise teaching notes. The recommended
writing time is 3 hours, with a passing score of 80%. Aligned with Accredited by the Accreditation Review Council
on Education in Surgical Technology and Surgical Assisting (ARC/STSA) and compliant with US university
standards for health professions education. standards and reflects the question style commonly seen on accredited
program examinations. Students consistently achieving above the cut score on this bank have historically gone on
to earn A+ on the corresponding course exam. Read every stem carefully - distractors are written to look
Section 1: General (Questions 1-200)
1 A surgeon requests a suture material that maintains tensile strength for prolonged
periods and elicits minimal tissue reaction. Which of the following best meets
these criteria?
A) Chromic catgut
B) Polypropylene
C) Polyglactin 910
D) Surgical silk
Answer: B
Rationale: Polypropylene is a nonabsorbable monofilament that retains strength
indefinitely and causes minimal tissue reaction. Chromic catgut is absorbable with
variable strength loss. Polyglactin 910 is absorbable with strength lost by 60 days.
Silk is nonabsorbable but elicits significant tissue reaction.
2 During a laparoscopic cholecystectomy, the scrub person notices that the light
cable is not properly connected to the endoscope, causing intermittent
illumination. Which of the following is the most appropriate action?
A) Continue surgery and adjust the cable when convenient
B) Replace the entire endoscope with a new sterile one
C) Reconnect the cable securely and check the light source
D) Use a flashlight to provide illumination
,Answer: C
Rationale: Proper connection ensures consistent illumination and safety. Continuing
with intermittent light risks surgical error. Replacing the endoscope is unnecessary
and costly. Flashlights are not sterile or appropriate for surgical fields.
3 A surgical technologist is preparing a sterile field for a total hip arthroplasty.
Which of the following best describes the correct sequence for draping the
extremity?
A) Place a half sheet under the limb, then apply an extremity drape from hip to
foot
B) Apply an adhesive incise drape directly to the skin, then place towels around
the incision site
C) Drape the proximal area first, then the distal limb, and finally the periphery
D) Cover the entire table with a single large sheet, then fenestrate at the surgical
site
Answer: A
Rationale: The correct sequence is to first place a half sheet under the limb for a
sterile barrier, then apply an extremity drape that covers from hip to foot. This
maintains sterility and allows for manipulation. Option B reverses the order (incise
drape after skin prep). Option C risks contamination by moving from distal to
proximal. Option D does not provide proper limb coverage.
4 Which of the following sterilization methods is most appropriate for a flexible
fiberoptic endoscope that is heat-sensitive and requires rapid turnaround?
A) Steam sterilization at 132°C for 4 minutes
B) Ethylene oxide (EtO) sterilization
C) Hydrogen peroxide gas plasma sterilization
D) Peracetic acid immersion
Answer: C
Rationale: Hydrogen peroxide gas plasma operates at low temperatures (45-55°C)
and has a short cycle time (about 1 hour), making it ideal for heat-sensitive
instruments needing rapid turnaround. Steam sterilization (A) would damage the
endoscope. EtO (B) requires long aeration (hours to days). Peracetic acid immersion
(D) is for immersible instruments only and may not be compatible with all
endoscopes.
5 A patient undergoing a colonoscopy suddenly develops bradycardia and
hypotension. The surgical technologist should suspect which of the following?
,A) Vasovagal response due to mesenteric traction
B) Anaphylactic reaction to the bowel prep
C) Hemorrhage from a perforated vessel
D) Malignant hyperthermia
Answer: A
Rationale: Vasovagal response is common during colonoscopy due to stretching of
the mesentery, leading to bradycardia and hypotension. Anaphylaxis (B) typically
includes urticaria and bronchospasm. Hemorrhage (C) would present with
tachycardia and hypotension. Malignant hyperthermia (D) involves hyperthermia
and muscle rigidity.
6 In a surgical wound classification, a case involving entry into the genitourinary
tract without evidence of infection is classified as:
A) Class I (Clean)
B) Class II (Clean-Contaminated)
C) Class III (Contaminated)
D) Class IV (Dirty-Infected)
Answer: B
Rationale: Entry into the genitourinary tract under controlled conditions without
infection is clean-contaminated (Class II). Class I is for uninfected operative wounds
without entry into respiratory, alimentary, or genitourinary tracts. Class III involves
gross spillage or acute inflammation. Class IV is for existing infection.
7 Which of the following is the primary purpose of using a pneumatic tourniquet
during extremity surgery?
A) Reduce blood loss and provide a bloodless field
B) Prevent embolism of fat or bone marrow
C) Facilitate intravenous access
D) Immobilize the limb for fracture reduction
Answer: A
Rationale: The primary purpose is to occlude blood flow to minimize blood loss and
create a clear surgical field. Tourniquets do not prevent embolism (B); that is
achieved by proper technique. They are not used for IV access (C) or immobilization
(D), though they may aid reduction by reducing bleeding.
8 A surgical technologist notices that the biological indicator (BI) for a steam
sterilizer load shows growth after incubation. What is the most appropriate
immediate action?
, A) Recall all items from that load and re-sterilize
B) Ignore the result if chemical indicators passed
C) Retest the BI with a different lot number
D) Use the items if they were wrapped and stored properly
Answer: A
Rationale: A positive BI indicates sterilization failure; all items must be recalled and
reprocessed. Chemical indicators are not definitive for sterility assurance. Retesting
(C) delays action and does not address the risk. Using items (D) is unsafe.
9 During a procedure, the surgeon requests a hemostatic agent that works by
activating the clotting cascade and can be used in patients with heparin sensitivity.
Which agent is most appropriate?
A) Thrombin spray
B) Gelatin sponge
C) Oxidized cellulose
D) Microfibrillar collagen
Answer: A
Rationale: Thrombin directly converts fibrinogen to fibrin, activating the clotting
cascade independently of heparin. Gelatin sponge (B) provides a mechanical matrix
but does not directly activate clotting. Oxidized cellulose (C) has a low pH that may
inhibit thrombin. Microfibrillar collagen (D) promotes platelet aggregation but does
not directly activate the cascade.
10 A surgical technologist is counting sponges at the end of a laparotomy. The
count is incorrect, with one sponge missing. Which of the following is the most
appropriate next step?
A) Continue the count and document the discrepancy after surgery
B) Immediately inform the surgeon and initiate a search
C) Assume the sponge was not used and close the incision
D) Use a magnet to locate the sponge externally
Answer: B
Rationale: Any count discrepancy must be reported immediately so the surgeon can
search the wound and cavity. Delaying (A) risks retained sponge. Assuming it was
not used (C) is unsafe. Magnets (D) are not effective for locating sponges and may
cause injury.
Questions & Answers for Guaranteed Pass | Newest Upd - 200
Questions
This exam covers core principles of surgical technology including aseptic technique, sterilization, surgical
anatomy, patient safety, and perioperative care. Questions require synthesis of concepts and application to
complex clinical scenarios. It contains 200 multiple-choice questions, each with four distractors and a fully
worked rationale that explains why the keyed answer is correct. Content is organized into 1 focused section:
General. Targeted learning outcomes include: Apply principles of aseptic technique to prevent surgical site
infections; Analyze sterilization methods and their indications; Integrate knowledge of anatomy and physiology
into surgical procedures; Evaluate patient safety measures in the perioperative environment. Every item has been
reviewed for clinical accuracy, current guidelines, and clarity so that students can study with confidence and
self-correct as they work through the bank. Use it as a high-yield review immediately before the exam, or as a
structured practice tool during the unit - the rationales double as concise teaching notes. The recommended
writing time is 3 hours, with a passing score of 80%. Aligned with Accredited by the Accreditation Review Council
on Education in Surgical Technology and Surgical Assisting (ARC/STSA) and compliant with US university
standards for health professions education. standards and reflects the question style commonly seen on accredited
program examinations. Students consistently achieving above the cut score on this bank have historically gone on
to earn A+ on the corresponding course exam. Read every stem carefully - distractors are written to look
Section 1: General (Questions 1-200)
1 A surgeon requests a suture material that maintains tensile strength for prolonged
periods and elicits minimal tissue reaction. Which of the following best meets
these criteria?
A) Chromic catgut
B) Polypropylene
C) Polyglactin 910
D) Surgical silk
Answer: B
Rationale: Polypropylene is a nonabsorbable monofilament that retains strength
indefinitely and causes minimal tissue reaction. Chromic catgut is absorbable with
variable strength loss. Polyglactin 910 is absorbable with strength lost by 60 days.
Silk is nonabsorbable but elicits significant tissue reaction.
2 During a laparoscopic cholecystectomy, the scrub person notices that the light
cable is not properly connected to the endoscope, causing intermittent
illumination. Which of the following is the most appropriate action?
A) Continue surgery and adjust the cable when convenient
B) Replace the entire endoscope with a new sterile one
C) Reconnect the cable securely and check the light source
D) Use a flashlight to provide illumination
,Answer: C
Rationale: Proper connection ensures consistent illumination and safety. Continuing
with intermittent light risks surgical error. Replacing the endoscope is unnecessary
and costly. Flashlights are not sterile or appropriate for surgical fields.
3 A surgical technologist is preparing a sterile field for a total hip arthroplasty.
Which of the following best describes the correct sequence for draping the
extremity?
A) Place a half sheet under the limb, then apply an extremity drape from hip to
foot
B) Apply an adhesive incise drape directly to the skin, then place towels around
the incision site
C) Drape the proximal area first, then the distal limb, and finally the periphery
D) Cover the entire table with a single large sheet, then fenestrate at the surgical
site
Answer: A
Rationale: The correct sequence is to first place a half sheet under the limb for a
sterile barrier, then apply an extremity drape that covers from hip to foot. This
maintains sterility and allows for manipulation. Option B reverses the order (incise
drape after skin prep). Option C risks contamination by moving from distal to
proximal. Option D does not provide proper limb coverage.
4 Which of the following sterilization methods is most appropriate for a flexible
fiberoptic endoscope that is heat-sensitive and requires rapid turnaround?
A) Steam sterilization at 132°C for 4 minutes
B) Ethylene oxide (EtO) sterilization
C) Hydrogen peroxide gas plasma sterilization
D) Peracetic acid immersion
Answer: C
Rationale: Hydrogen peroxide gas plasma operates at low temperatures (45-55°C)
and has a short cycle time (about 1 hour), making it ideal for heat-sensitive
instruments needing rapid turnaround. Steam sterilization (A) would damage the
endoscope. EtO (B) requires long aeration (hours to days). Peracetic acid immersion
(D) is for immersible instruments only and may not be compatible with all
endoscopes.
5 A patient undergoing a colonoscopy suddenly develops bradycardia and
hypotension. The surgical technologist should suspect which of the following?
,A) Vasovagal response due to mesenteric traction
B) Anaphylactic reaction to the bowel prep
C) Hemorrhage from a perforated vessel
D) Malignant hyperthermia
Answer: A
Rationale: Vasovagal response is common during colonoscopy due to stretching of
the mesentery, leading to bradycardia and hypotension. Anaphylaxis (B) typically
includes urticaria and bronchospasm. Hemorrhage (C) would present with
tachycardia and hypotension. Malignant hyperthermia (D) involves hyperthermia
and muscle rigidity.
6 In a surgical wound classification, a case involving entry into the genitourinary
tract without evidence of infection is classified as:
A) Class I (Clean)
B) Class II (Clean-Contaminated)
C) Class III (Contaminated)
D) Class IV (Dirty-Infected)
Answer: B
Rationale: Entry into the genitourinary tract under controlled conditions without
infection is clean-contaminated (Class II). Class I is for uninfected operative wounds
without entry into respiratory, alimentary, or genitourinary tracts. Class III involves
gross spillage or acute inflammation. Class IV is for existing infection.
7 Which of the following is the primary purpose of using a pneumatic tourniquet
during extremity surgery?
A) Reduce blood loss and provide a bloodless field
B) Prevent embolism of fat or bone marrow
C) Facilitate intravenous access
D) Immobilize the limb for fracture reduction
Answer: A
Rationale: The primary purpose is to occlude blood flow to minimize blood loss and
create a clear surgical field. Tourniquets do not prevent embolism (B); that is
achieved by proper technique. They are not used for IV access (C) or immobilization
(D), though they may aid reduction by reducing bleeding.
8 A surgical technologist notices that the biological indicator (BI) for a steam
sterilizer load shows growth after incubation. What is the most appropriate
immediate action?
, A) Recall all items from that load and re-sterilize
B) Ignore the result if chemical indicators passed
C) Retest the BI with a different lot number
D) Use the items if they were wrapped and stored properly
Answer: A
Rationale: A positive BI indicates sterilization failure; all items must be recalled and
reprocessed. Chemical indicators are not definitive for sterility assurance. Retesting
(C) delays action and does not address the risk. Using items (D) is unsafe.
9 During a procedure, the surgeon requests a hemostatic agent that works by
activating the clotting cascade and can be used in patients with heparin sensitivity.
Which agent is most appropriate?
A) Thrombin spray
B) Gelatin sponge
C) Oxidized cellulose
D) Microfibrillar collagen
Answer: A
Rationale: Thrombin directly converts fibrinogen to fibrin, activating the clotting
cascade independently of heparin. Gelatin sponge (B) provides a mechanical matrix
but does not directly activate clotting. Oxidized cellulose (C) has a low pH that may
inhibit thrombin. Microfibrillar collagen (D) promotes platelet aggregation but does
not directly activate the cascade.
10 A surgical technologist is counting sponges at the end of a laparotomy. The
count is incorrect, with one sponge missing. Which of the following is the most
appropriate next step?
A) Continue the count and document the discrepancy after surgery
B) Immediately inform the surgeon and initiate a search
C) Assume the sponge was not used and close the incision
D) Use a magnet to locate the sponge externally
Answer: B
Rationale: Any count discrepancy must be reported immediately so the surgeon can
search the wound and cavity. Delaying (A) risks retained sponge. Assuming it was
not used (C) is unsafe. Magnets (D) are not effective for locating sponges and may
cause injury.
