Ohio Hazardous Materials Technician
Exam Practice Questions And Correct
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Rationales 2025|2026 Q&A | Instant
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1. Which of the following is the primary responsibility of a hazardous
materials technician?
A. Fire suppression
B. Containment and mitigation of hazardous materials incidents
C. Traffic control
D. Emergency medical care
Rationale: The main role of a hazardous materials technician is to
control and mitigate hazardous materials releases to protect people
and the environment.
2. The acronym SDS stands for:
A. Safety Data Sheet
, B. Safety Data Sheet
C. Safety Department Standard
D. Standard Data Safety
Rationale: SDS provides detailed information on chemical hazards,
handling, storage, and emergency measures.
3. The NFPA 704 diamond indicates what type of information?
A. Shipping requirements
B. Health, flammability, reactivity, and special hazards
C. Toxicity levels only
D. Emergency response procedures
Rationale: NFPA 704 is used to provide quick visual identification of
chemical hazards through a color-coded diamond system.
4. Which type of protective clothing provides the highest level of
chemical resistance?
A. Structural firefighting gear
B. Fully encapsulated chemical suit (Level A)
C. Tyvek suit
D. Splash-resistant apron
Rationale: Level A suits provide full-body encapsulation with self-
contained breathing apparatus (SCBA) to prevent exposure.
5. What is the primary hazard associated with flammable liquids?
A. Corrosive burns
B. Fire and explosion
, C. Radiation exposure
D. Electrical shock
Rationale: Flammable liquids can ignite easily and cause fires or
explosions if not handled properly.
6. The Emergency Response Guidebook (ERG) is primarily used by:
A. Police officers
B. First responders during the initial phase of a hazardous materials
incident
C. Chemists in laboratories
D. Environmental engineers for cleanup planning
Rationale: The ERG provides first responders with guidance on initial
actions, isolation distances, and protective measures.
7. A chemical with a UN number starting with “1” indicates:
A. Flammable liquid
B. Explosives
C. Toxic gas
D. Oxidizer
Rationale: UN numbers beginning with 1 are classified as explosives
according to DOT labeling conventions.
8. Which monitoring instrument is commonly used for detecting
combustible gases?
A. Geiger counter
B. LEL (Lower Explosive Limit) meter
, C. Spectrophotometer
D. Thermocouple
Rationale: LEL meters detect flammable gases at concentrations
approaching the lower explosive limit.
9. Which type of hazard does corrosive material present?
A. Chemical burns to skin or eyes
B. Explosions
C. Toxic inhalation only
D. Radioactive contamination
Rationale: Corrosive substances can chemically destroy living tissue
upon contact.
10. What is the primary method for controlling a hazardous
materials spill on water?
A. Evaporation
B. Containment and recovery using booms and skimmers
C. Dilution with water
D. Incineration
Rationale: Booms and skimmers are used to contain and recover
hazardous liquids to prevent environmental contamination.
11. The IDLH (Immediately Dangerous to Life or Health) value
indicates:
A. Minimum protective equipment required
B. The maximum concentration of a substance that an individual can
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2025|2026 Q&A | Instant
Download Pdf
1. Which of the following is the primary responsibility of a hazardous
materials technician?
A. Fire suppression
B. Containment and mitigation of hazardous materials incidents
C. Traffic control
D. Emergency medical care
Rationale: The main role of a hazardous materials technician is to
control and mitigate hazardous materials releases to protect people
and the environment.
2. The acronym SDS stands for:
A. Safety Data Sheet
, B. Safety Data Sheet
C. Safety Department Standard
D. Standard Data Safety
Rationale: SDS provides detailed information on chemical hazards,
handling, storage, and emergency measures.
3. The NFPA 704 diamond indicates what type of information?
A. Shipping requirements
B. Health, flammability, reactivity, and special hazards
C. Toxicity levels only
D. Emergency response procedures
Rationale: NFPA 704 is used to provide quick visual identification of
chemical hazards through a color-coded diamond system.
4. Which type of protective clothing provides the highest level of
chemical resistance?
A. Structural firefighting gear
B. Fully encapsulated chemical suit (Level A)
C. Tyvek suit
D. Splash-resistant apron
Rationale: Level A suits provide full-body encapsulation with self-
contained breathing apparatus (SCBA) to prevent exposure.
5. What is the primary hazard associated with flammable liquids?
A. Corrosive burns
B. Fire and explosion
, C. Radiation exposure
D. Electrical shock
Rationale: Flammable liquids can ignite easily and cause fires or
explosions if not handled properly.
6. The Emergency Response Guidebook (ERG) is primarily used by:
A. Police officers
B. First responders during the initial phase of a hazardous materials
incident
C. Chemists in laboratories
D. Environmental engineers for cleanup planning
Rationale: The ERG provides first responders with guidance on initial
actions, isolation distances, and protective measures.
7. A chemical with a UN number starting with “1” indicates:
A. Flammable liquid
B. Explosives
C. Toxic gas
D. Oxidizer
Rationale: UN numbers beginning with 1 are classified as explosives
according to DOT labeling conventions.
8. Which monitoring instrument is commonly used for detecting
combustible gases?
A. Geiger counter
B. LEL (Lower Explosive Limit) meter
, C. Spectrophotometer
D. Thermocouple
Rationale: LEL meters detect flammable gases at concentrations
approaching the lower explosive limit.
9. Which type of hazard does corrosive material present?
A. Chemical burns to skin or eyes
B. Explosions
C. Toxic inhalation only
D. Radioactive contamination
Rationale: Corrosive substances can chemically destroy living tissue
upon contact.
10. What is the primary method for controlling a hazardous
materials spill on water?
A. Evaporation
B. Containment and recovery using booms and skimmers
C. Dilution with water
D. Incineration
Rationale: Booms and skimmers are used to contain and recover
hazardous liquids to prevent environmental contamination.
11. The IDLH (Immediately Dangerous to Life or Health) value
indicates:
A. Minimum protective equipment required
B. The maximum concentration of a substance that an individual can
