200+ Free CBRN Practice Questions

Pass your BCEN Certified Burn Registered Nurse exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

65-75% Pass Rate

200+ Questions

100% Free

1 / 200

Question 1

Score: 0/0

Which zone of burn injury is characterized by irreversible cell death and coagulation necrosis?

Zone of stasis

Zone of coagulation

Zone of hyperemia

Zone of inflammation

to track

2026 Statistics

Key Facts: CBRN Exam

175

Total Questions

150 scored

3 hrs

Exam Time

BCEN

65-75%

Pass Rate

BCEN 2025

25%

Acute Care

Largest domain

$285-380

Exam Fee

BCEN 2026

4 years

Certification Valid

Recertification cycle

The CBRN exam is the only dedicated burn nursing certification. It contains 175 questions (150 scored) over 3 hours. Content covers the complete burn care continuum from resuscitation through rehabilitation. Pass rates range from 65-75%. Eligibility requires current RN license plus 2 years and 2,000 hours of burn nursing experience. BCEN certification demonstrates expertise in this specialized field.

Sample CBRN Practice Questions

Try these sample questions to test your CBRN exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1Which zone of burn injury is characterized by irreversible cell death and coagulation necrosis?

A.Zone of stasis

B.Zone of coagulation

C.Zone of hyperemia

D.Zone of inflammation

Explanation: The zone of coagulation (also called the zone of necrosis) is the central area of maximum thermal damage where cells undergo irreversible coagulation necrosis due to protein denaturation. This tissue is non-viable and will not recover. The zone of stasis surrounds this area with impaired circulation but potentially salvageable tissue, while the zone of hyperemia is the outermost area with minimal injury that will recover.

2A patient with 40% TBSA burns develops hypotension, decreased cardiac output, and increased systemic vascular resistance within the first 24 hours. Which phase of burn shock is most likely occurring?

A.Hypermetabolic phase

B.Ebb phase

C.Flow phase

D.Remodeling phase

Explanation: The ebb phase (resuscitative phase) occurs within the first 24-48 hours post-burn and is characterized by decreased cardiac output, increased systemic vascular resistance, hypotension, and reduced tissue perfusion due to massive fluid shifts and hypovolemia. The flow phase (hypermetabolic phase) follows, characterized by increased cardiac output and metabolic rate.

3Inhalation injury caused by incomplete combustion of synthetic materials most commonly results in which type of toxicity?

A.Carbon dioxide poisoning

B.Carbon monoxide poisoning

C.Oxygen toxicity

D.Nitrogen narcosis

Explanation: Carbon monoxide (CO) poisoning is the most common and dangerous toxicity from inhalation injury. CO binds to hemoglobin with 200-250 times greater affinity than oxygen, forming carboxyhemoglobin (COHb), which impairs oxygen delivery to tissues. Levels above 10% in smokers or 5% in non-smokers indicate significant exposure.

4Which inflammatory mediator is primarily responsible for the increased capillary permeability seen in burn injuries?

A.Insulin

B.Histamine and prostaglandins

C.Thyroid hormone

D.Growth hormone

Explanation: Histamine, prostaglandins, and other inflammatory mediators (bradykinin, serotonin) are released in response to burn injury and cause increased capillary permeability. This leads to fluid shifts from intravascular to interstitial spaces, resulting in edema and hypovolemia. Understanding these mechanisms is crucial for proper fluid resuscitation.

5During the proliferative phase of wound healing, which cell type is primarily responsible for collagen synthesis?

A.Neutrophils

B.Macrophages

C.Fibroblasts

D.Platelets

Explanation: Fibroblasts are the primary cells responsible for collagen synthesis during the proliferative phase of wound healing. They migrate into the wound bed, produce collagen and extracellular matrix, and facilitate wound contraction. Macrophages clear debris and release growth factors, while neutrophils primarily fight infection in the inflammatory phase.

6A patient with electrical burns develops myoglobinuria. Which metabolic complication is most concerning?

A.Hyperkalemia

B.Hypoglycemia

C.Respiratory alkalosis

D.Hypocalcemia

Explanation: Electrical injuries cause massive muscle destruction (rhabdomyolysis), releasing myoglobin and potassium into circulation. Hyperkalemia is the most immediately life-threatening complication as it can cause cardiac dysrhythmias and arrest. Myoglobinuria can also cause acute kidney injury if not aggressively treated with fluid resuscitation.

7Systemic Inflammatory Response Syndrome (SIRS) in burn patients is defined by the presence of at least two of which criteria?

A.Fever or hypothermia, tachycardia, tachypnea, abnormal WBC count

B.Hypotension, bradycardia, hypothermia, hypoglycemia

C.Hypertension, hyperglycemia, fever, altered mental status

D.Bradypnea, bradycardia, hypotension, hypothermia

Explanation: SIRS criteria include: temperature >38°C or <36°C, heart rate >90 bpm, respiratory rate >20 breaths/min or PaCO2 <32 mmHg, and WBC >12,000/mm³ or <4,000/mm³. In burn patients, these findings must be interpreted cautiously as the hypermetabolic response to burns can mimic SIRS, making sepsis diagnosis more challenging.

8Which metabolic change occurs during the hypermetabolic phase following major burn injury?

A.Decreased core body temperature

B.Increased protein catabolism and energy expenditure

C.Decreased gluconeogenesis

D.Decreased cardiac output

Explanation: The hypermetabolic phase (flow phase) following major burns is characterized by increased metabolic rate (up to 2-3 times basal), increased protein catabolism, increased gluconeogenesis, lipolysis, and elevated core temperature. This phase can persist for months and requires aggressive nutritional support to prevent muscle wasting and impaired healing.

9Using the Rule of Nines, what percentage of total body surface area (TBSA) is affected by burns involving the entire anterior trunk and both anterior legs?

A.27%

B.36%

C.45%

D.54%

Explanation: The Rule of Nines assigns 18% to the anterior trunk and 9% to each anterior leg (18% total for both). Therefore: 18% (anterior trunk) + 18% (both anterior legs) = 36% TBSA. The Rule of Nines is: head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18% (9% anterior + 9% posterior), perineum 1%.

10According to the Parkland formula, how much fluid should a 70-kg patient with 40% TBSA burns receive in the first 8 hours post-injury?

A.2,800 mL

B.4,000 mL

C.5,600 mL

D.11,200 mL

Explanation: The Parkland formula calculates fluid needs as: 4 mL × weight (kg) × %TBSA. For this patient: 4 × 70 × 40 = 11,200 mL total in first 24 hours. Half of this (5,600 mL) is given in the first 8 hours from the time of injury, and the remaining half over the next 16 hours.

About the CBRN Exam

The CBRN is the first specialty certification dedicated exclusively to burn nursing, validating advanced skills across the entire burn care continuum. The exam covers six domains: Pathophysiology (15%), Initial Management (13%), Acute Care (25%), PAD - Pain, Agitation, Delirium (15%), Wound Management (22%), and Professional Practice (10%). The exam consists of 175 items (150 scored, 25 unscored pretest).

Questions

175 scored questions

Time Limit

3 hours

Passing Score

Scaled (approximately 70%)

Exam Fee

$285-380 (BCEN (Board of Certification for Emergency Nursing) / PSI)

CBRN Exam Content Outline

15%

Pathophysiology

Etiology of burn injury, zones of injury, burn shock, inflammatory response, SIRS/MODS, metabolic response, wound healing phases, inhalation injury types and management

13%

Initial Management

Prehospital care, primary and secondary assessment, burn size calculation, fluid resuscitation formulas, resuscitation goals, stabilization, secondary complications, compartment syndrome

25%

Acute Care

Systems assessment and management, infection control, sepsis management, nutrition management, hypermetabolism, glycemic control, rehabilitation, scar and contracture prevention, positioning

15%

PAD - Pain, Agitation, Delirium

Pain assessment and management, acute and chronic pain, neuropathic pain, agitation and anxiety management, delirium prevention and treatment, pruritis management

22%

Wound Management

Wound assessment and depth, local wound care, debridement, topical therapy, dressings, surgical management, excision techniques, skin grafting, allograft, skin substitutes, donor site care

10%

Professional Practice

Ethics, end-of-life care, quality improvement, interprofessional collaboration, diversity and inclusion, self-care and resiliency, community outreach education, disaster management

How to Pass the CBRN Exam

What You Need to Know

Passing score: Scaled (approximately 70%)
Exam length: 175 questions
Time limit: 3 hours
Exam fee: $285-380

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CBRN Study Tips from Top Performers

1Master fluid resuscitation calculations using Parkland and Modified Brooke formulas

2Know the Rule of Nines and Lund-Browder chart for TBSA estimation

3Understand the zones of burn injury and the pathophysiology of burn shock

4Study wound management including topical agents, dressings, and grafting techniques

5Learn infection control and sepsis recognition in burn patients

6Understand the hypermetabolic response and nutritional requirements

7Know positioning and contracture prevention for different burn locations

8Study inhalation injury assessment and airway management

9Review pain management including multimodal approaches and procedural pain

10Understand professional issues including ethics, disaster management, and interprofessional collaboration

Frequently Asked Questions

What is the CBRN exam?

The CBRN (Certified Burn Registered Nurse) is the first specialty certification dedicated exclusively to burn nursing. It is offered by BCEN (Board of Certification for Emergency Nursing) and validates advanced knowledge and skills across the entire burn care continuum from resuscitation through rehabilitation.

What are the CBRN eligibility requirements?

To sit for the CBRN exam, you must have: (1) Current unrestricted RN license in the U.S. or Canada, (2) Minimum 2 years of burn nursing experience, and (3) Minimum 2,000 hours of burn nursing practice. Experience must include direct patient care in burn center or burn unit settings.

How many questions are on the CBRN exam?

The CBRN exam contains 175 questions total, with 150 scored questions and 25 unscored pretest questions. You have 3 hours to complete the exam. The exam is administered via computer-based testing at PSI testing centers.

What content areas are covered on the CBRN exam?

The CBRN exam covers six domains: Pathophysiology (15%), Initial Management (13%), Acute Care (25%), PAD - Pain, Agitation, Delirium (15%), Wound Management (22%), and Professional Practice (10%). Acute Care is the largest domain, reflecting the complex, multi-system nature of burn patient care.

What is the CBRN pass rate?

The CBRN pass rate typically ranges from 65-75% depending on preparation and clinical experience. The exam uses scaled scoring, with the passing standard set by BCEN using a criterion-referenced methodology. BCEN credential holders generally have higher pass rates than non-credentialed nurses.

How long is CBRN certification valid?

CBRN certification is valid for 4 years. Recertification can be achieved through continuing education (100 contact hours in burn nursing) or by retaking the exam. BCEN requires ongoing professional development to maintain certification.

How should I prepare for the CBRN exam?

Study systematically across all six domains. Use the BCEN CBRN Exam Content Outline, burn nursing textbooks (such as the ABA Burn Nursing textbook), and practice questions. Focus on high-yield areas including fluid resuscitation, wound management, infection control, and the hypermetabolic response. Plan for 3-4 months of dedicated study time.