Passing the Certified Occupational Health Nurse exam requires strategic preparation and a clear understanding of what content matters most. The COHN exam contains 160 multiple-choice questions, though only 135 are scored, with 25 unscored pretest questions scattered throughout. You'll have three hours to complete it, so knowing where to focus your COHN study guide efforts makes all the difference.

Clinical Practice and Case Management
This section contains 72 scored questions and represents the largest portion of the exam. You need solid knowledge of workplace injury assessment, treatment protocols, and return-to-work planning. Topics include injury assessment, basic first aid, and follow-up care for workplace injuries. Don't just memorize procedures. Understand how to apply them in real workplace scenarios because the occupational health exam questions test practical decision-making, not just theory.

Risk Assessment and Compliance
This area covers workplace hazard identification, employee education, and preventive health strategies. You'll face questions about OSHA regulations, safety standards, and occupational health compliance requirements. The exam expects you to know how to spot potential hazards before they become problems. Study ergonomics, industrial hygiene basics, and how to conduct effective workplace safety certification audits.

Program Management and Operations
Case management questions focus on return-to-work programs, injury management, and collaborating with healthcare providers. You'll need to demonstrate knowledge of wellness program development, health education delivery, and quality metrics. This section of the COHN exam content also tests your understanding of budget considerations and strategic planning for workplace health nursing services.

How to Prepare Effectively?
Recently certified occupational health nurses recommend beginning a regular study plan about six months before your exam date. Use a COHN practice test to identify your weak spots early. The ABOHN provides an Exam Content Outline that breaks down specific topics covered. Focus your COHN exam preparation sessions on areas where you score lowest rather than reviewing what you already know well.
Join a study group if possible. Other nurses preparing for the occupational health nurse certification can offer different perspectives and help you stay accountable. Take timed occupational health practice questions to get comfortable with the pace you'll need on test day.

Frequently Asked Questions

What's the COHN passing score?
Generally, you need to answer at least 71% of questions correctly, which means getting approximately 96 questions right out of 135 scored items. The exact passing score varies slightly between ABOHN certification exam versions.

Can I take breaks during the exam?
Yes, you can take breaks whenever needed, but the timer continues running during your break time. Plan bathroom breaks carefully to maximize your available working time.

What if I don't pass on my first attempt?
You can retake the exam, though you'll need to pay the full testing fee again. Use your score report to identify specific content areas in case management nursing that need more study before scheduling your next attempt.

Conclusion
Success on the COHN exam comes down to focused preparation in the right areas. Prioritize clinical practice and case management since it carries the most weight. Build strong knowledge of compliance requirements and program operations. Start your COHN exam preparation months in advance, use practice questions extensively, and don't skip the areas that feel uncomfortable. Your certification proves you have the expertise employers need for workplace health and safety roles.