Nevada Industrial Hygienist Licensing
Exam Practice Questions And Correct
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Rationales 2026 Q&A | Instant
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1. Which organization establishes permissible exposure limits (PELs)
under federal workplace regulations?
A. CDC
B. OSHA
C. EPA
D. NIH
Correct exposure limits in U.S. workplaces are primarily established
and enforced by OSHA to protect workers from hazardous exposures.
2. The primary goal of industrial hygiene is to:
A. Increase production efficiency
B. Eliminate all workplace hazards instantly
C. Anticipate, recognize, evaluate, and control hazards
D. Conduct criminal investigations
Industrial hygiene focuses on systematically identifying and
controlling workplace health hazards to prevent occupational illness.
3. Which sampling method is most appropriate for measuring time-
weighted average (TWA) exposures?
A. Grab sampling only
B. Personal air sampling over a full shift
C. Visual inspection
D. Area sampling exclusively
, TWA exposures are best assessed using personal sampling devices
worn by workers throughout the work shift.
4. Which instrument is commonly used to measure airborne particulate
matter?
A. Sound level meter
B. Air sampling pump with filter cassette
C. Thermometer
D. Lux meter
Airborne particulates are collected using calibrated pumps connected
to filter media for laboratory analysis.
5. Noise exposure is typically measured using a:
A. Dosimeter
B. Sound level meter
C. Anemometer
D. Barometer
Sound level meters measure noise intensity in decibels to assess
occupational hearing risk.
6. The hierarchy of controls places which method as most effective?
A. PPE
B. Administrative controls
C. Engineering controls
D. Elimination
Elimination removes the hazard completely and is the most effective
control strategy.
7. Which gas is a common asphyxiant in confined spaces?
A. Oxygen
B. Carbon monoxide
C. Nitrogen
D. Ozone
Nitrogen can displace oxygen in confined spaces, leading to oxygen
deficiency.
8. Carbon monoxide exposure primarily affects which body system?
A. Skeletal
B. Cardiovascular and nervous systems
C. Integumentary
, D. Endocrine
Carbon monoxide binds to hemoglobin, reducing oxygen delivery to
vital organs.
9. A Material Safety Data Sheet (SDS) provides information about:
A. Employee salaries
B. Chemical hazards and safe handling procedures
C. Equipment maintenance
D. Legal contracts
SDS documents outline chemical properties, hazards, protective
measures, and emergency procedures.
10. Which term describes the average exposure over an 8-hour
workday?
A. Ceiling limit
B. Short-term exposure limit
C. Time-weighted average
D. Peak limit
TWA represents the average exposure concentration over a standard
work shift.
11. Respiratory protection programs require:
A. Optional training
B. Medical evaluation and fit testing
C. No documentation
D. Supervisor approval only
Proper respiratory protection requires medical clearance and fit
testing for effectiveness.
12. Which control reduces hazard exposure by changing work
procedures?
A. Elimination
B. Substitution
C. Administrative controls
D. Isolation
Administrative controls modify how tasks are performed to limit
exposure duration or frequency.
13. Biological monitoring measures:
A. Air contaminants
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which organization establishes permissible exposure limits (PELs)
under federal workplace regulations?
A. CDC
B. OSHA
C. EPA
D. NIH
Correct exposure limits in U.S. workplaces are primarily established
and enforced by OSHA to protect workers from hazardous exposures.
2. The primary goal of industrial hygiene is to:
A. Increase production efficiency
B. Eliminate all workplace hazards instantly
C. Anticipate, recognize, evaluate, and control hazards
D. Conduct criminal investigations
Industrial hygiene focuses on systematically identifying and
controlling workplace health hazards to prevent occupational illness.
3. Which sampling method is most appropriate for measuring time-
weighted average (TWA) exposures?
A. Grab sampling only
B. Personal air sampling over a full shift
C. Visual inspection
D. Area sampling exclusively
, TWA exposures are best assessed using personal sampling devices
worn by workers throughout the work shift.
4. Which instrument is commonly used to measure airborne particulate
matter?
A. Sound level meter
B. Air sampling pump with filter cassette
C. Thermometer
D. Lux meter
Airborne particulates are collected using calibrated pumps connected
to filter media for laboratory analysis.
5. Noise exposure is typically measured using a:
A. Dosimeter
B. Sound level meter
C. Anemometer
D. Barometer
Sound level meters measure noise intensity in decibels to assess
occupational hearing risk.
6. The hierarchy of controls places which method as most effective?
A. PPE
B. Administrative controls
C. Engineering controls
D. Elimination
Elimination removes the hazard completely and is the most effective
control strategy.
7. Which gas is a common asphyxiant in confined spaces?
A. Oxygen
B. Carbon monoxide
C. Nitrogen
D. Ozone
Nitrogen can displace oxygen in confined spaces, leading to oxygen
deficiency.
8. Carbon monoxide exposure primarily affects which body system?
A. Skeletal
B. Cardiovascular and nervous systems
C. Integumentary
, D. Endocrine
Carbon monoxide binds to hemoglobin, reducing oxygen delivery to
vital organs.
9. A Material Safety Data Sheet (SDS) provides information about:
A. Employee salaries
B. Chemical hazards and safe handling procedures
C. Equipment maintenance
D. Legal contracts
SDS documents outline chemical properties, hazards, protective
measures, and emergency procedures.
10. Which term describes the average exposure over an 8-hour
workday?
A. Ceiling limit
B. Short-term exposure limit
C. Time-weighted average
D. Peak limit
TWA represents the average exposure concentration over a standard
work shift.
11. Respiratory protection programs require:
A. Optional training
B. Medical evaluation and fit testing
C. No documentation
D. Supervisor approval only
Proper respiratory protection requires medical clearance and fit
testing for effectiveness.
12. Which control reduces hazard exposure by changing work
procedures?
A. Elimination
B. Substitution
C. Administrative controls
D. Isolation
Administrative controls modify how tasks are performed to limit
exposure duration or frequency.
13. Biological monitoring measures:
A. Air contaminants
