CNOR (OPERATING ROOM NURSE) – PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
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Core Domains
Preoperative Patient Assessment and Diagnosis
Plan of Care
Intraoperative Care
Communication and Documentation
Infection Prevention and Control
Equipment and Material Management
Emergency Situations
Professional Accountabilities
Introduction
The purpose of this comprehensive assessment is to validate the specialized
knowledge and clinical judgment required of a perioperative nurse seeking CNOR
certification. This exam evaluates the candidate’s proficiency across the entire
surgical continuum, focusing on patient safety, physiological monitoring, and the
,management of the sterile field. The structure consists of multiple-choice and
scenario-based questions designed to mirror the complexities of the operating room
environment. Emphasis is placed on real-world application, critical thinking, and
evidence-based decision-making. By navigating these questions, candidates
demonstrate their mastery of regulatory compliance, ethical standards, and the
technical skills necessary to deliver high-quality surgical care.
Section One: Questions 1–100
1. A patient undergoing a total hip arthroplasty is placed in the lateral decubitus
position. Which of the following is the primary physiological concern related to
this positioning?
A. Increased tidal volume
B. Pressure on the peroneal nerve
C. Decreased venous return from the lower extremities
D. Dependent lung atelectasis
🟢 Correct answer: D. Dependent lung atelectasis
🔴 RATIONALE: In the lateral decubitus position, the weight of the mediastinum and
,the abdominal contents can compress the dependent lung, leading to decreased
ventilation-perfusion matching and atelectasis.
2. During a procedure using a monopolar electrosurgical unit (ESU), where is the
most appropriate location to place the dispersive electrode (grounding pad)?
A. Over a bony prominence to ensure stability
B. On a large, well-perfused muscle mass
C. Near a metallic prosthesis to enhance conductivity
D. As far away from the surgical site as possible
🟢 Correct answer: B. On a large, well-perfused muscle mass
🔴 RATIONALE: The dispersive electrode should be placed on a clean, dry area with
high vascularity and muscle mass to safely return the electrical current to the
generator without causing heat buildup or burns.
3. Which of the following is a symptom of a systemic toxic reaction to a local
anesthetic?
A. Hypertension and tachycardia
B. Metallic taste and tinnitus
C. Increased respiratory rate
, D. Hyperreflexia and diaphoresis
🟢 Correct answer: B. Metallic taste and tinnitus
🔴 RATIONALE: Local Anesthetic Systemic Toxicity (LAST) typically manifests with
central nervous system signs such as a metallic taste, tinnitus, perioral numbness,
and visual disturbances before progressing to seizures or cardiac arrest.
4. A surgical technologist notices a small hole in their glove during a vascular graft
procedure. What is the immediate correct action?
A. Double glove over the existing glove
B. Wait until the current step of the procedure is finished
C. Change the glove and the sleeve of the gown
D. Step away from the field and change the glove immediately
🟢 Correct answer: D. Step away from the field and change the glove immediately
🔴 RATIONALE: To maintain the integrity of the sterile field and prevent surgical site
infection, any breach in the sterile barrier must be corrected immediately by changing
the contaminated item.
5. According to AORN guidelines, what is the maximum recommended weight for
a single instrument tray to ensure sterilization efficacy and staff safety?
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
Core Domains
Preoperative Patient Assessment and Diagnosis
Plan of Care
Intraoperative Care
Communication and Documentation
Infection Prevention and Control
Equipment and Material Management
Emergency Situations
Professional Accountabilities
Introduction
The purpose of this comprehensive assessment is to validate the specialized
knowledge and clinical judgment required of a perioperative nurse seeking CNOR
certification. This exam evaluates the candidate’s proficiency across the entire
surgical continuum, focusing on patient safety, physiological monitoring, and the
,management of the sterile field. The structure consists of multiple-choice and
scenario-based questions designed to mirror the complexities of the operating room
environment. Emphasis is placed on real-world application, critical thinking, and
evidence-based decision-making. By navigating these questions, candidates
demonstrate their mastery of regulatory compliance, ethical standards, and the
technical skills necessary to deliver high-quality surgical care.
Section One: Questions 1–100
1. A patient undergoing a total hip arthroplasty is placed in the lateral decubitus
position. Which of the following is the primary physiological concern related to
this positioning?
A. Increased tidal volume
B. Pressure on the peroneal nerve
C. Decreased venous return from the lower extremities
D. Dependent lung atelectasis
🟢 Correct answer: D. Dependent lung atelectasis
🔴 RATIONALE: In the lateral decubitus position, the weight of the mediastinum and
,the abdominal contents can compress the dependent lung, leading to decreased
ventilation-perfusion matching and atelectasis.
2. During a procedure using a monopolar electrosurgical unit (ESU), where is the
most appropriate location to place the dispersive electrode (grounding pad)?
A. Over a bony prominence to ensure stability
B. On a large, well-perfused muscle mass
C. Near a metallic prosthesis to enhance conductivity
D. As far away from the surgical site as possible
🟢 Correct answer: B. On a large, well-perfused muscle mass
🔴 RATIONALE: The dispersive electrode should be placed on a clean, dry area with
high vascularity and muscle mass to safely return the electrical current to the
generator without causing heat buildup or burns.
3. Which of the following is a symptom of a systemic toxic reaction to a local
anesthetic?
A. Hypertension and tachycardia
B. Metallic taste and tinnitus
C. Increased respiratory rate
, D. Hyperreflexia and diaphoresis
🟢 Correct answer: B. Metallic taste and tinnitus
🔴 RATIONALE: Local Anesthetic Systemic Toxicity (LAST) typically manifests with
central nervous system signs such as a metallic taste, tinnitus, perioral numbness,
and visual disturbances before progressing to seizures or cardiac arrest.
4. A surgical technologist notices a small hole in their glove during a vascular graft
procedure. What is the immediate correct action?
A. Double glove over the existing glove
B. Wait until the current step of the procedure is finished
C. Change the glove and the sleeve of the gown
D. Step away from the field and change the glove immediately
🟢 Correct answer: D. Step away from the field and change the glove immediately
🔴 RATIONALE: To maintain the integrity of the sterile field and prevent surgical site
infection, any breach in the sterile barrier must be corrected immediately by changing
the contaminated item.
5. According to AORN guidelines, what is the maximum recommended weight for
a single instrument tray to ensure sterilization efficacy and staff safety?
