Hazmat Operations Exam Latest

Hazmat Operations Exam (Latest Update 2025 / 2026) Questions & Answers | 100% Correct | Grade A

Question:

Which division in hazard class 1: Explosives have a mass explosion hazard that

would affect almost the entire load instantaneously?

• Division 1.1
• Division 1.3
• Division 1.4
• Division 1.6

Answer:

A: Division 1.1

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Question:

Tactics for radiological incidents include:

• Tun on all ventilation systems
• Conduct overhaul and clean-up operations
• Disperse dust plums with streams from fog nozzles
• Use time, distance, and shielding as protective measures

Answer:

D: Use time, distance, and shielding as protective measures

Question:

Use of only ______ self-contained breathing apparatus ( SCBA ) is allowed in incidents where personnel are exposed to hazardous materials.

• Pressure-demand close-circuit
• Positive-pressure single-pathway
• Pressure-demand open-circuit or closed-circuit
• Positive-pressure open-circuit or closed-circuit

Answer:

D: Positive-pressure open-circuit or closed-circuit

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Question:

Inhalation is the route of exposure by which hazardous materials enter the

body by:

• Passing through your skin or eyes
• Puncture by a contaminated sharp or pointed object
• Breathing hazardous materials in through your nose or mouth
• Eating or swallowing hazardous materials through your mouth

Answer:

C: Breathing hazardous materials in through your nose or mouth

Question:

OSHA title 29 CFR 1910.120 mandates that incidents are critiqued ( post-

incident critique ) for the purpose of:

• Determining the cause of the incident
• Recommending remediation actions to restore the site
• Identifying operational deficiencies and learning from mistakes
• Calculating incident expenses to allow for the recovery of costs incurred

from the incident

Answer:

C: Identifying operational deficiencies and learning from mistakes

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Question:

If responders discover an illicit lab, they should:

• Stop, get out, and report it to authorities immediately
• Initiate clean-up operations according to SOP/G's
• Search the area for secondary devices and booby traps
• Station a responder inside the door to control the scene

Answer:

A: Stop, get out, and report it to authorities immediately

Question:

What hazard class includes reactive substances or articles with a great deal of potential energy that may rapidly expand and release upon activation?

A. Class 1: Explosives

B. Class 3: Flammable Liquids

C. Class 4: Flammable Solids; Spontaneously Combustible, and Dangerous

When Wet

D. Class 7: Radioactive Materials

Answer:

A: Class 1: Explosives

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