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292+ Free CBRN Practice Questions

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Key Facts: CBRN Exam

175

Total Questions

150 scored + 25 pretest

180 min

Seat Time

BCEN CBRN FAQ

115/150

Passing Standard

BCEN CBRN FAQ

25 items

Largest Domains

Initial Management & Acute Care

$285-380

Exam Fee

ABA member / non-member

4 years

Certification Valid

Recertification cycle

The CBRN exam is the only dedicated burn nursing certification. It contains 175 items (150 scored, 25 unscored pretest) over a 180-minute seat time. BCEN publishes the passing standard as 115 of the 150 scored items answered correctly, reported as pass or fail from the raw score. Content covers nine domains spanning resuscitation through rehabilitation, ambulatory care, special populations, and professional practice. Eligibility requires a current, unencumbered RN or APRN license in the U.S., a U.S. territory, Canada, or Australia; about two years of specialty experience is recommended but not required.

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 292+ 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.
3Smoke inhalation from structural fires most commonly results in which systemic toxicity?
A.Carbon dioxide poisoning
B.Carbon monoxide poisoning
C.Oxygen toxicity
D.Nitrogen narcosis
Explanation: Carbon monoxide (CO) is the most common systemic toxicity from smoke inhalation. CO binds to hemoglobin with approximately 200-250 times greater affinity than oxygen, forming carboxyhemoglobin and impairing oxygen delivery. Hydrogen cyanide from burning synthetics (e.g., polyurethane) is also important in enclosed-space fires but is less commonly measured; CO remains the predominant systemic poison tested and treated acutely with 100% oxygen.
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 official BCEN content outline (effective July 2023) divides 150 scored items across nine domains: Pathophysiology (15 items), Initial Management (25), Acute Care (25), Pain/Agitation/Delirium (15), Wound Management (22), Psychosocial Support and Patient Advocacy (10), Ambulatory and Reconstruction (10), Special Populations (18), and Professional Practice (10). The exam consists of 175 items (150 scored, 25 unscored pretest) in 180 minutes.

Questions

175 scored questions

Time Limit

3 hours

Passing Score

115 of 150 scored items correct (76.7%)

Exam Fee

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

CBRN Exam Content Outline

10.0%

Pathophysiology

15 of 150 scored items. Etiology of burn injury; local response and zones of injury; systemic response including burn shock, inflammatory response, SIRS, MODS and the metabolic response; phases of wound healing through scar maturation; inhalation injury types and etiology.

16.7%

Clinical Practice: Initial Management (<72 hours)

25 of 150 scored items. Prehospital care, primary and secondary assessment and ABA transfer criteria; %TBSA calculation, resuscitation formulas, fluid titration and patient response goals; hemodynamic stabilization, thermoregulation and oxygenation; over- and under-resuscitation, compartment syndromes, dysrhythmias and ARDS; mechanism of injury and concomitant trauma.

16.7%

Clinical Practice: Acute Care

25 of 150 scored items. Systems assessment and management across neurological, HEENT, respiratory, cardiovascular, gastrointestinal, genitourinary, musculoskeletal and integumentary systems; infection control, localized infection and sepsis; nutrition management, hypermetabolism, enteral and parenteral nutrition and glycemic control; rehabilitation and the burn therapist role.

10.0%

Clinical Practice: Assessment, Treatment and Evaluation of Pain, Agitation, Delirium (PAD)

15 of 150 scored items. Acute, chronic and neuropathic pain; agitation and anxiety; delirium; acute and chronic pruritus.

14.7%

Clinical Practice: Wound Management

22 of 150 scored items. Wound depth assessment; local wound care, debridement and patient education; topicals and dressings; excision technique, allograft, xenograft and autograft including ASCS and CEA, plus perioperative and donor-site nursing; dermal substitutes; contracture and scar prevention.

6.7%

Psychosocial Support and Patient Advocacy

10 of 150 scored items. Acute stress disorder, depression and PTSD; body image and intimacy; community reintegration into school and work, support resources, peer-to-peer support and burn camp.

6.7%

Ambulatory and Reconstruction

10 of 150 scored items. Scar types with non-surgical and surgical scar management; patient and family education; inpatient-to-outpatient transition and discharge teaching covering home wound management, home therapeutics, sequelae and medication management.

12.0%

Special Populations

18 of 150 scored items. Pediatrics; older adults; pregnant patients; non-burn skin conditions including friction injury, frostbite, necrotizing fasciitis and TEN/SJS/NSTI; non-accidental trauma with CPS/APS referral; substance use disorders.

6.7%

Professional Practice

10 of 150 scored items. Ethics including end-of-life care, goals of care, spiritual considerations, decisional capacity and cultural considerations; quality and process improvement; interprofessional collaboration; diversity, equity and inclusion; self-care and resiliency; intraprofessional nursing collaboration and education; community outreach and home safety education; disaster management.

How to Pass the CBRN Exam

What You Need to Know

  • Passing score: 115 of 150 scored items correct (76.7%)
  • Exam length: 175 questions
  • Time limit: 3 hours
  • Exam fee: $285-380

Keys to Passing

  • Work through all 292 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CBRN Study Tips from Top Performers

1Master fluid resuscitation calculations using the ABA consensus formula, Parkland, and Modified Brooke
2Know the Rule of Nines, the Lund-Browder chart, and the palmar method for TBSA estimation
3Understand the zones of burn injury and the pathophysiology of burn shock
4Study wound management including topical agents, dressings, excision, and grafting techniques
5Learn infection control and the ABA consensus criteria that separate burn sepsis from hypermetabolic SIRS
6Understand the hypermetabolic response and nutritional requirements
7Know positioning, splinting, and contracture prevention for different burn locations
8Study inhalation injury assessment, airway management, and carbon monoxide and cyanide toxicity
9Review pain, agitation, delirium, and pruritus management including multimodal and non-pharmacological approaches
10Do not skip the 38 scored items in Psychosocial Support, Ambulatory and Reconstruction, and Special Populations

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 hold a current, unencumbered Registered Nurse or APRN license issued in the United States, a U.S. territory, Canada, or Australia, with no active restriction, suspension, probation, or disciplinary order. International credentials equivalent to a U.S. RN license may qualify when verified through TruMerit. BCEN recommends about two years of experience in the specialty before testing, but experience is not required and BCEN publishes no minimum practice-hour requirement.

How many questions are on the CBRN exam?

The CBRN exam contains 175 items in total: 150 scored items and 25 unscored pretest items. Total seat time is 180 minutes (3 hours). The exam is delivered by computer at PSI testing centers or through PSI Live Remote Proctoring.

What content areas are covered on the CBRN exam?

The official BCEN content outline effective July 2023 divides the 150 scored items across nine domains: Pathophysiology (15 items), Clinical Practice: Initial Management under 72 hours (25), Clinical Practice: Acute Care (25), Clinical Practice: Pain, Agitation and Delirium (15), Clinical Practice: Wound Management (22), Psychosocial Support and Patient Advocacy (10), Ambulatory and Reconstruction (10), Special Populations (18), and Professional Practice (10). The outline publishes item counts rather than percentages, so Initial Management and Acute Care are tied as the largest domains at 25 items each, or about 16.7% of the exam.

What is the CBRN pass rate?

BCEN does not publish a CBRN first-time pass rate. What BCEN does publish is the passing standard: candidates must answer 115 of the 150 scored items correctly. Results are reported as pass or fail based on the raw score, the exam is not curved, and candidates who do not pass receive the number of items answered correctly within each content-outline area.

How long is CBRN certification valid?

CBRN certification is valid for four years. Recertification is available by continuing education attestation — 100 contact hours within the cycle, of which at least 75 must be burn clinical content and at least 50 must come from an accredited provider — or by retaking the exam. BCEN randomly audits roughly 10% of recertification applications.

How should I prepare for the CBRN exam?

Study systematically against the official BCEN CBRN Examination Content Outline rather than a six-domain summary, because Psychosocial Support, Ambulatory and Reconstruction, and Special Populations together account for 38 of the 150 scored items. Use the ABA burn nursing literature, the outline itself, and practice questions. High-yield areas include fluid resuscitation, wound and surgical management, infection control, the hypermetabolic response, pain and delirium, and the professional practice topics. Plan for three to four months of dedicated study.