10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The COHN exam has 160 questions and runs 3 hours.
These 10 free COHN questions are organized by exam domain, so you can see how each part of the Certified Occupational Health Nurse blueprint is tested. Reveal the answer and explanation under each question.
A warehouse employee reports acute low-back pain after lifting a 70-pound box. The occupational health nurse completes an assessment and determines there are no neurologic deficits, red-flag symptoms, or signs of serious injury. Which intervention is MOST appropriate?
Correct answer: A - Recommend continued activity with appropriate restrictions and a plan for reassessment
An occupational health nurse reviews a worker's spirometry results as part of a respiratory surveillance program. The nurse's PRIMARY responsibility is to:
Correct answer: B - Interpret findings within the worker's clinical context and coordinate appropriate follow-up
A worker recovering from a shoulder injury can safely perform administrative tasks but cannot complete the essential lifting requirements of the original job. Which occupational health action BEST supports a safe outcome?
Correct answer: C - Coordinate modified duties that match documented functional limitations
A nurse is managing an employee with a work-related injury involving multiple providers, treatment milestones, and employer communication. Which activity BEST represents occupational health case management?
Correct answer: B - Coordinating care, monitoring progress, and evaluating outcomes
An employee requests information about a coworker's medical restriction status. Which response BEST reflects occupational health confidentiality principles?
Correct answer: C - Protect confidential health information and disclose only authorized work-related information
An employee has repeated absences related to a chronic condition that is not caused by work. Which service is MOST aligned with occupational health case management?
Correct answer: B - Coordinate appropriate resources and support functional outcomes
During a workplace assessment, an occupational health nurse identifies repeated bending, twisting, and forceful gripping as contributors to employee discomfort. Which approach addresses the hazard at the source?
Correct answer: C - Redesigning the task or workstation using ergonomic principles
A nurse is selecting controls for a workplace chemical exposure. Which intervention generally represents the highest level of protection in the hierarchy of controls?
Correct answer: A - Eliminating the hazardous chemical from the process
A company introduces mandatory drug testing for safety-sensitive positions. Which responsibility is MOST appropriate for the occupational health nurse?
Correct answer: A - Ensure the program follows applicable legal, ethical, and organizational requirements
A manufacturing facility experiences a sudden release of an unknown airborne substance. Several employees report eye irritation and coughing. What should the occupational health nurse prioritize FIRST?
Correct answer: B - Activate emergency response procedures and protect affected workers
The COHN exam also covers these domains. Drill them in the full free practice test:
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