COLORADO INDUSTRIAL HYGIENE TECHNICIAN
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary goal of industrial hygiene?
A. Increase workplace productivity
B. Eliminate all workplace hazards completely
C. Anticipate, recognize, evaluate, and control workplace
hazards
D. Enforce legal penalties for violations
Rationale: Industrial hygiene focuses on prevention of
occupational disease by managing hazards.
Correct Answer: C
2. Which route of exposure is most common for airborne
contaminants?
A. Ingestion
B. Dermal absorption
C. Inhalation
D. Injection
Rationale: Airborne contaminants primarily enter through
breathing.
Correct Answer: C
,3. What does TLV stand for?
A. Toxic Level Value
B. Threshold Limit Value
C. Time-Limited Ventilation
D. Toxicity Load Volume
Rationale: TLV is an exposure guideline published by ACGIH.
Correct Answer: B
4. Which organization publishes Permissible Exposure Limits
(PELs)?
A. OSHA
B. WHO
C. ACGIH
D. NIOSH
Rationale: OSHA sets legal exposure limits enforceable by law.
Correct Answer: A
5. Which term describes a substance that can cause cancer?
A. Mutagen
B. Carcinogen
C. Irritant
D. Asphyxiant
,Rationale: Carcinogens are agents that cause cancer.
Correct Answer: B
6. What is the main purpose of ventilation in industrial
hygiene?
A. Increase air humidity
B. Dilute or remove airborne contaminants
C. Increase air pressure
D. Control temperature only
Rationale: Ventilation reduces exposure by controlling airborne
hazards.
Correct Answer: B
7. Which instrument is commonly used to measure airborne
dust concentration?
A. Gas chromatograph
B. Sound level meter
C. Personal sampling pump with filter cassette
D. Lux meter
Rationale: Dust sampling requires air pumps and filters.
Correct Answer: C
8. Which is an acute health effect?
, A. Lung cancer
B. Hearing loss over 20 years
C. Chemical burn immediately after exposure
D. Silicosis
Rationale: Acute effects occur shortly after exposure.
Correct Answer: C
9. What does PPE stand for?
A. Personal Protective Equipment
B. Primary Pollution Elimination
C. Protective Process Engineering
D. Personal Prevention Equipment
Rationale: PPE is equipment worn to minimize exposure.
Correct Answer: A
10. Which gas is a simple asphyxiant?
A. Carbon monoxide
B. Oxygen
C. Nitrogen
D. Chlorine
Rationale: Nitrogen displaces oxygen in confined spaces.
Correct Answer: C
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary goal of industrial hygiene?
A. Increase workplace productivity
B. Eliminate all workplace hazards completely
C. Anticipate, recognize, evaluate, and control workplace
hazards
D. Enforce legal penalties for violations
Rationale: Industrial hygiene focuses on prevention of
occupational disease by managing hazards.
Correct Answer: C
2. Which route of exposure is most common for airborne
contaminants?
A. Ingestion
B. Dermal absorption
C. Inhalation
D. Injection
Rationale: Airborne contaminants primarily enter through
breathing.
Correct Answer: C
,3. What does TLV stand for?
A. Toxic Level Value
B. Threshold Limit Value
C. Time-Limited Ventilation
D. Toxicity Load Volume
Rationale: TLV is an exposure guideline published by ACGIH.
Correct Answer: B
4. Which organization publishes Permissible Exposure Limits
(PELs)?
A. OSHA
B. WHO
C. ACGIH
D. NIOSH
Rationale: OSHA sets legal exposure limits enforceable by law.
Correct Answer: A
5. Which term describes a substance that can cause cancer?
A. Mutagen
B. Carcinogen
C. Irritant
D. Asphyxiant
,Rationale: Carcinogens are agents that cause cancer.
Correct Answer: B
6. What is the main purpose of ventilation in industrial
hygiene?
A. Increase air humidity
B. Dilute or remove airborne contaminants
C. Increase air pressure
D. Control temperature only
Rationale: Ventilation reduces exposure by controlling airborne
hazards.
Correct Answer: B
7. Which instrument is commonly used to measure airborne
dust concentration?
A. Gas chromatograph
B. Sound level meter
C. Personal sampling pump with filter cassette
D. Lux meter
Rationale: Dust sampling requires air pumps and filters.
Correct Answer: C
8. Which is an acute health effect?
, A. Lung cancer
B. Hearing loss over 20 years
C. Chemical burn immediately after exposure
D. Silicosis
Rationale: Acute effects occur shortly after exposure.
Correct Answer: C
9. What does PPE stand for?
A. Personal Protective Equipment
B. Primary Pollution Elimination
C. Protective Process Engineering
D. Personal Prevention Equipment
Rationale: PPE is equipment worn to minimize exposure.
Correct Answer: A
10. Which gas is a simple asphyxiant?
A. Carbon monoxide
B. Oxygen
C. Nitrogen
D. Chlorine
Rationale: Nitrogen displaces oxygen in confined spaces.
Correct Answer: C
