Michigan Industrial Hygienist Certification
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the most appropriate method for
controlling airborne dust in an industrial setting?
A. Personal protective equipment only
B. Local exhaust ventilation
C. Administrative controls only
D. Substituting raw materials
B. Local exhaust ventilation
Local exhaust ventilation removes contaminants at the source, which is
generally more effective than relying solely on PPE or administrative
controls.
2. The permissible exposure limit (PEL) set by OSHA is based on:
A. Short-term exposure only
B. Average exposure over an 8-hour workday
C. Maximum exposure at any one time
D. Employee comfort levels
B. Average exposure over an 8-hour workday
PEL represents the time-weighted average concentration of a substance
that a worker can be exposed to safely over an 8-hour shift.
3. What is the primary route of entry for solvents such as benzene in
the workplace?
, A. Ingestion
B. Dermal absorption and inhalation
C. Injection
D. Eye contact
B. Dermal absorption and inhalation
Solvents like benzene can be absorbed through the skin and lungs,
making both routes significant for exposure.
4. Which of the following instruments measures airborne particulate
concentration?
A. Gas chromatograph
B. Photometer
C. Aerosol monitor
D. Sound level meter
C. Aerosol monitor
Aerosol monitors are designed to measure the concentration of airborne
particles, including dust, fumes, and mists.
5. The hierarchy of controls prioritizes which method as the most
effective for hazard reduction?
A. Personal protective equipment
B. Engineering controls
C. Administrative controls
D. Substitution
D. Substitution
Substitution of a hazardous material with a less hazardous one is the
most effective control because it eliminates or reduces the hazard at the
source.
, 6. What does TLV stand for in industrial hygiene?
A. Total Limit Value
B. Threshold Limit Value
C. Toxicity Level Value
D. Time-Limited Value
B. Threshold Limit Value
TLVs are guideline values for chemical substances and physical agents,
indicating levels considered safe for worker exposure.
7. A noise level of 100 dBA is measured in a factory. Which of the
following is recommended?
A. No action required
B. Administrative controls only
C. Hearing protection and exposure time reduction
D. Only earplugs
C. Hearing protection and exposure time reduction
At 100 dBA, noise exposure exceeds OSHA limits for an 8-hour shift;
engineering, administrative, and PPE controls are needed.
8. Which biological monitoring method is commonly used for lead
exposure?
A. Urine lead measurement
B. Blood lead level
C. Hair analysis
D. Saliva testing
B. Blood lead level
Blood lead levels directly reflect recent and cumulative exposure,
making it the standard biomonitoring method.
, 9. Confined space entry requires which of the following safety
measures?
A. Air monitoring
B. Permit system
C. Rescue plan
D. All of the above
D. All of the above
Confined space entry is high risk and requires air quality monitoring, a
formal permit, and emergency planning.
10. Which method is used to measure carbon monoxide in the
workplace?
A. Gas detector tubes
B. Infrared spectroscopy
C. Both A and B
D. UV-Vis spectrophotometry
C. Both A and B
Gas detector tubes provide spot measurements, while infrared
spectroscopy offers continuous monitoring.
11. The primary goal of industrial hygiene is to:
A. Ensure worker comfort
B. Prevent occupational illnesses and injuries
C. Reduce company liability
D. Increase productivity
B. Prevent occupational illnesses and injuries
Industrial hygiene focuses on identifying, evaluating, and controlling
workplace hazards to protect health.
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which of the following is the most appropriate method for
controlling airborne dust in an industrial setting?
A. Personal protective equipment only
B. Local exhaust ventilation
C. Administrative controls only
D. Substituting raw materials
B. Local exhaust ventilation
Local exhaust ventilation removes contaminants at the source, which is
generally more effective than relying solely on PPE or administrative
controls.
2. The permissible exposure limit (PEL) set by OSHA is based on:
A. Short-term exposure only
B. Average exposure over an 8-hour workday
C. Maximum exposure at any one time
D. Employee comfort levels
B. Average exposure over an 8-hour workday
PEL represents the time-weighted average concentration of a substance
that a worker can be exposed to safely over an 8-hour shift.
3. What is the primary route of entry for solvents such as benzene in
the workplace?
, A. Ingestion
B. Dermal absorption and inhalation
C. Injection
D. Eye contact
B. Dermal absorption and inhalation
Solvents like benzene can be absorbed through the skin and lungs,
making both routes significant for exposure.
4. Which of the following instruments measures airborne particulate
concentration?
A. Gas chromatograph
B. Photometer
C. Aerosol monitor
D. Sound level meter
C. Aerosol monitor
Aerosol monitors are designed to measure the concentration of airborne
particles, including dust, fumes, and mists.
5. The hierarchy of controls prioritizes which method as the most
effective for hazard reduction?
A. Personal protective equipment
B. Engineering controls
C. Administrative controls
D. Substitution
D. Substitution
Substitution of a hazardous material with a less hazardous one is the
most effective control because it eliminates or reduces the hazard at the
source.
, 6. What does TLV stand for in industrial hygiene?
A. Total Limit Value
B. Threshold Limit Value
C. Toxicity Level Value
D. Time-Limited Value
B. Threshold Limit Value
TLVs are guideline values for chemical substances and physical agents,
indicating levels considered safe for worker exposure.
7. A noise level of 100 dBA is measured in a factory. Which of the
following is recommended?
A. No action required
B. Administrative controls only
C. Hearing protection and exposure time reduction
D. Only earplugs
C. Hearing protection and exposure time reduction
At 100 dBA, noise exposure exceeds OSHA limits for an 8-hour shift;
engineering, administrative, and PPE controls are needed.
8. Which biological monitoring method is commonly used for lead
exposure?
A. Urine lead measurement
B. Blood lead level
C. Hair analysis
D. Saliva testing
B. Blood lead level
Blood lead levels directly reflect recent and cumulative exposure,
making it the standard biomonitoring method.
, 9. Confined space entry requires which of the following safety
measures?
A. Air monitoring
B. Permit system
C. Rescue plan
D. All of the above
D. All of the above
Confined space entry is high risk and requires air quality monitoring, a
formal permit, and emergency planning.
10. Which method is used to measure carbon monoxide in the
workplace?
A. Gas detector tubes
B. Infrared spectroscopy
C. Both A and B
D. UV-Vis spectrophotometry
C. Both A and B
Gas detector tubes provide spot measurements, while infrared
spectroscopy offers continuous monitoring.
11. The primary goal of industrial hygiene is to:
A. Ensure worker comfort
B. Prevent occupational illnesses and injuries
C. Reduce company liability
D. Increase productivity
B. Prevent occupational illnesses and injuries
Industrial hygiene focuses on identifying, evaluating, and controlling
workplace hazards to protect health.
