Exam Practice Questions And Correct

Ohio Hazardous Materials Technician Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• Which of the following is the primary responsibility of a hazardous

materials technician?

• Fire suppression
• Containment and mitigation of hazardous materials incidents
• Traffic control
• 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:

• Safety Data Sheet 1 / 4

• Safety Data Sheet
• Safety Department Standard
• Standard Data Safety

Rationale: SDS provides detailed information on chemical hazards,

handling, storage, and emergency measures.

• The NFPA 704 diamond indicates what type of information?
• Shipping requirements
• Health, flammability, reactivity, and special hazards
• Toxicity levels only
• Emergency response procedures

Rationale: NFPA 704 is used to provide quick visual identification of

chemical hazards through a color-coded diamond system.

• Which type of protective clothing provides the highest level of

chemical resistance?

• Structural firefighting gear
• Fully encapsulated chemical suit (Level A)
• Tyvek suit
• Splash-resistant apron

Rationale: Level A suits provide full-body encapsulation with self-

contained breathing apparatus (SCBA) to prevent exposure.

• What is the primary hazard associated with flammable liquids?
• Corrosive burns
• Fire and explosion 2 / 4

• Radiation exposure
• 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:

• Police officers
• First responders during the initial phase of a hazardous materials

incident

• Chemists in laboratories
• 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:

• Flammable liquid
• Explosives
• Toxic gas
• Oxidizer

Rationale: UN numbers beginning with 1 are classified as explosives

according to DOT labeling conventions.

• Which monitoring instrument is commonly used for detecting

combustible gases?

• Geiger counter
• LEL (Lower Explosive Limit) meter 3 / 4

• Spectrophotometer
• Thermocouple

Rationale: LEL meters detect flammable gases at concentrations

approaching the lower explosive limit.

• Which type of hazard does corrosive material present?
• Chemical burns to skin or eyes
• Explosions
• Toxic inhalation only
• Radioactive contamination

Rationale: Corrosive substances can chemically destroy living tissue

upon contact.

• What is the primary method for controlling a hazardous

materials spill on water?

• Evaporation
• Containment and recovery using booms and skimmers
• Dilution with water
• Incineration

Rationale: Booms and skimmers are used to contain and recover

hazardous liquids to prevent environmental contamination.

• The IDLH (Immediately Dangerous to Life or Health) value

indicates:

• Minimum protective equipment required
• The maximum concentration of a substance that an individual can
• / 4