Certified Occupational Health Nurse
(COHN(C)) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2025|2026 Q&A | Instant
Download Pdf
1. Which federal agency is primarily responsible for enforcing workplace
safety regulations?
a. CDC
b. NIOSH
c. OSHA
d. EPA
Rationale: OSHA enforces safety standards in workplaces. NIOSH conducts
research but does not enforce.
2. The main purpose of a pre-placement health assessment is to:
a. Identify infectious diseases
,b. Match the worker’s abilities with job demands
c. Provide general health promotion
d. Screen for substance abuse
Rationale: Pre-placement assessments evaluate fitness for duty and
prevent job-worker mismatch.
3. Which law protects employees’ right to keep their health information
confidential?
a. ADA
b. HIPAA
c. OSHA Act
d. FMLA
Rationale: HIPAA ensures protection of health records and confidentiality.
4. Which vaccination is most important for healthcare workers to receive?
a. MMR
b. Varicella
c. Hepatitis B
d. Polio
Rationale: Hepatitis B poses high occupational risk to healthcare workers.
5. The “hierarchy of controls” in occupational health prioritizes which
method first?
a. PPE
b. Administrative controls
c. Engineering controls
,d. Elimination/substitution
Rationale: The most effective method is eliminating or substituting the
hazard.
6. The main purpose of OSHA’s Hazard Communication Standard is to:
a. Monitor air quality
b. Train managers
c. Ensure workers know chemical hazards
d. Regulate worker compensation
Rationale: The standard requires employers to inform workers about
chemical hazards.
7. In audiometric testing, a Standard Threshold Shift (STS) is defined as:
a. 10 dB shift at any frequency
b. 20 dB shift at 4 kHz
c. 10 dB shift averaged at 2, 3, and 4 kHz
d. 5 dB shift at 1 kHz
Rationale: OSHA defines STS as 10 dB average shift at 2, 3, and 4 kHz in
either ear.
8. A nurse suspects a worker has carpal tunnel syndrome. The first step is
to:
a. Refer to a neurologist
b. Order wrist splints
c. Conduct occupational history and ergonomic assessment
d. Start anti-inflammatory medication
, Rationale: mOccupational mhistory mand mergonomic mevaluation
mdetermine mwork-related mrisk.
9. Bloodborne mPathogens mStandard mrequires memployers mto:
a. Provide mfree mTB mtesting
b. Mandate mflu mvaccination
c. Offer mHepatitis mB mvaccination mat mno mcost
d. Record mall mminor minjuries
Rationale: mEmployers mmust moffer mHepatitis mB mvaccine mto
mexposed mworkers mfree mof mcharge.
10. Which mof mthe mfollowing mis ma msecondary
mprevention mactivity min moccupational mhealth?
a. Pre-placement mscreening
b. Hearing mconservation maudiometry
c. Job mredesign
d. Rehabilitation
Rationale: mSecondary mprevention mdetects mearly mdisease mand
mprevents mprogression, me.g., maudiometry.
11. Which mact mrequires mreasonable maccommodation mfor
memployees mwith mdisabilities?
a. FMLA
b. ADA
c. HIPAA
d. COBRA
(COHN(C)) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2025|2026 Q&A | Instant
Download Pdf
1. Which federal agency is primarily responsible for enforcing workplace
safety regulations?
a. CDC
b. NIOSH
c. OSHA
d. EPA
Rationale: OSHA enforces safety standards in workplaces. NIOSH conducts
research but does not enforce.
2. The main purpose of a pre-placement health assessment is to:
a. Identify infectious diseases
,b. Match the worker’s abilities with job demands
c. Provide general health promotion
d. Screen for substance abuse
Rationale: Pre-placement assessments evaluate fitness for duty and
prevent job-worker mismatch.
3. Which law protects employees’ right to keep their health information
confidential?
a. ADA
b. HIPAA
c. OSHA Act
d. FMLA
Rationale: HIPAA ensures protection of health records and confidentiality.
4. Which vaccination is most important for healthcare workers to receive?
a. MMR
b. Varicella
c. Hepatitis B
d. Polio
Rationale: Hepatitis B poses high occupational risk to healthcare workers.
5. The “hierarchy of controls” in occupational health prioritizes which
method first?
a. PPE
b. Administrative controls
c. Engineering controls
,d. Elimination/substitution
Rationale: The most effective method is eliminating or substituting the
hazard.
6. The main purpose of OSHA’s Hazard Communication Standard is to:
a. Monitor air quality
b. Train managers
c. Ensure workers know chemical hazards
d. Regulate worker compensation
Rationale: The standard requires employers to inform workers about
chemical hazards.
7. In audiometric testing, a Standard Threshold Shift (STS) is defined as:
a. 10 dB shift at any frequency
b. 20 dB shift at 4 kHz
c. 10 dB shift averaged at 2, 3, and 4 kHz
d. 5 dB shift at 1 kHz
Rationale: OSHA defines STS as 10 dB average shift at 2, 3, and 4 kHz in
either ear.
8. A nurse suspects a worker has carpal tunnel syndrome. The first step is
to:
a. Refer to a neurologist
b. Order wrist splints
c. Conduct occupational history and ergonomic assessment
d. Start anti-inflammatory medication
, Rationale: mOccupational mhistory mand mergonomic mevaluation
mdetermine mwork-related mrisk.
9. Bloodborne mPathogens mStandard mrequires memployers mto:
a. Provide mfree mTB mtesting
b. Mandate mflu mvaccination
c. Offer mHepatitis mB mvaccination mat mno mcost
d. Record mall mminor minjuries
Rationale: mEmployers mmust moffer mHepatitis mB mvaccine mto
mexposed mworkers mfree mof mcharge.
10. Which mof mthe mfollowing mis ma msecondary
mprevention mactivity min moccupational mhealth?
a. Pre-placement mscreening
b. Hearing mconservation maudiometry
c. Job mredesign
d. Rehabilitation
Rationale: mSecondary mprevention mdetects mearly mdisease mand
mprevents mprogression, me.g., maudiometry.
11. Which mact mrequires mreasonable maccommodation mfor
memployees mwith mdisabilities?
a. FMLA
b. ADA
c. HIPAA
d. COBRA
