CERTIFIED OCCUPATIONAL HEALTH
NURSE (COHN/COHN-S) EXAM
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. The primary role of the occupational health nurse is to
A. Provide emergency trauma care
B. Diagnose medical conditions
C. Promote worker health and safety
D. Perform surgical procedures
Answer: C
Occupational health nurses focus on prevention, health promotion, and
protection of workers from occupational hazards.
2. OSHA’s primary purpose is to
A. Provide healthcare insurance
B. Enforce workplace safety standards
C. License healthcare workers
D. Regulate hospitals
Answer: B
OSHA establishes and enforces standards to ensure safe and healthy working
conditions.
3. A Material Safety Data Sheet (MSDS) provides information on
A. Employee salaries
B. Chemical hazards and safe handling
, C. Infection rates
D. Legal compliance
Answer: B
MSDS (now SDS) outlines hazards, handling, storage, and emergency measures
for chemicals.
4. The most effective method of hazard control is
A. Personal protective equipment
B. Administrative controls
C. Engineering controls
D. Worker education
Answer: C
Engineering controls remove or isolate hazards at the source, making them most
effective.
5. Which condition is considered an occupational disease?
A. Hypertension
B. Diabetes mellitus
C. Silicosis
D. Asthma due to pollen
Answer: C
Silicosis results from workplace exposure to silica dust.
6. The purpose of pre-placement health examinations is to
A. Exclude unhealthy workers
B. Establish baseline health status
C. Reduce insurance costs
D. Replace annual exams
Answer: B
Baseline data helps detect future work-related changes in health.
7. Noise exposure is most likely to cause
A. Conductive hearing loss
, B. Sensorineural hearing loss
C. Otitis media
D. Vertigo only
Answer: B
Chronic noise damages the inner ear, causing sensorineural hearing loss.
8. The time-weighted average (TWA) refers to
A. Peak exposure level
B. Average exposure over a workday
C. Exposure during emergencies
D. Short-term exposure limit
Answer: B
TWA represents average exposure over an 8-hour workday.
9. An example of a biological hazard is
A. Noise
B. Solvents
C. Bacteria
D. Radiation
Answer: C
Biological hazards include bacteria, viruses, and fungi.
10.The first step in the nursing process is
A. Planning
B. Diagnosis
C. Assessment
D. Evaluation
Answer: C
Assessment involves collecting data to identify health needs.
11.Ergonomics focuses on
A. Chemical exposure
NURSE (COHN/COHN-S) EXAM
QUESTION AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A INSTANT DOWNLOAD PDF
1. The primary role of the occupational health nurse is to
A. Provide emergency trauma care
B. Diagnose medical conditions
C. Promote worker health and safety
D. Perform surgical procedures
Answer: C
Occupational health nurses focus on prevention, health promotion, and
protection of workers from occupational hazards.
2. OSHA’s primary purpose is to
A. Provide healthcare insurance
B. Enforce workplace safety standards
C. License healthcare workers
D. Regulate hospitals
Answer: B
OSHA establishes and enforces standards to ensure safe and healthy working
conditions.
3. A Material Safety Data Sheet (MSDS) provides information on
A. Employee salaries
B. Chemical hazards and safe handling
, C. Infection rates
D. Legal compliance
Answer: B
MSDS (now SDS) outlines hazards, handling, storage, and emergency measures
for chemicals.
4. The most effective method of hazard control is
A. Personal protective equipment
B. Administrative controls
C. Engineering controls
D. Worker education
Answer: C
Engineering controls remove or isolate hazards at the source, making them most
effective.
5. Which condition is considered an occupational disease?
A. Hypertension
B. Diabetes mellitus
C. Silicosis
D. Asthma due to pollen
Answer: C
Silicosis results from workplace exposure to silica dust.
6. The purpose of pre-placement health examinations is to
A. Exclude unhealthy workers
B. Establish baseline health status
C. Reduce insurance costs
D. Replace annual exams
Answer: B
Baseline data helps detect future work-related changes in health.
7. Noise exposure is most likely to cause
A. Conductive hearing loss
, B. Sensorineural hearing loss
C. Otitis media
D. Vertigo only
Answer: B
Chronic noise damages the inner ear, causing sensorineural hearing loss.
8. The time-weighted average (TWA) refers to
A. Peak exposure level
B. Average exposure over a workday
C. Exposure during emergencies
D. Short-term exposure limit
Answer: B
TWA represents average exposure over an 8-hour workday.
9. An example of a biological hazard is
A. Noise
B. Solvents
C. Bacteria
D. Radiation
Answer: C
Biological hazards include bacteria, viruses, and fungi.
10.The first step in the nursing process is
A. Planning
B. Diagnosis
C. Assessment
D. Evaluation
Answer: C
Assessment involves collecting data to identify health needs.
11.Ergonomics focuses on
A. Chemical exposure
