HAZMAT TECHNICIAN CERTIFICATION EXAM
ACTUAL QUESTIONS AND ANSWERS - LATEST
AND COMPLETE UPDATE WITH VERIFIED
SOLUTIONS – ASSURED PASS WITH INSTANT
DOWNLOAD PDF.
1. What is the primary purpose of a Material Safety Data Sheet (MSDS) or
Safety Data Sheet (SDS)?
A. To provide a list of suppliers for the chemical
B. To outline emergency response procedures only
C. To provide comprehensive information on chemical properties,
hazards, and safe handling
D. To report regulatory violations to authorities
Rationale: SDS contains detailed information about chemical properties,
hazards, protective measures, and emergency procedures, essential for safe
handling and response.
2. Which NFPA 704 diamond color represents health hazards?
A. Yellow
B. Blue
C. Red
D. White
Rationale: In NFPA 704, blue indicates health hazards, red is flammability,
yellow is reactivity, and white is special information.
3. A tanker truck carrying chlorine gas is leaking at a highway intersection.
What is the first step for a HazMat Technician on arrival?
A. Attempt to stop the leak immediately
B. Evacuate the surrounding area only
, C. Establish scene control and assess the situation from a safe distance
D. Enter the tank to inspect the leak
Rationale: Scene safety and assessment from a safe distance is always the
first step to prevent exposure before mitigation.
4. Which respiratory protection is required for a known IDLH chlorine gas
release?
A. Half-mask air-purifying respirator
B. PAPR with chemical cartridges
C. Self-contained breathing apparatus (SCBA)
D. N95 respirator
Rationale: IDLH (Immediately Dangerous to Life or Health) atmospheres
require SCBA for full protection.
5. The term “vapor density” refers to:
A. The weight of a vapor relative to water
B. The weight of a vapor relative to air
C. The volume of vapor produced at standard temperature
D. The flammability limit of a vapor
Rationale: Vapor density compares the weight of a vapor to air; values >1
indicate the vapor will sink.
6. During a confined space HazMat entry, continuous monitoring indicates
oxygen levels dropping below 19.5%. The technician should:
A. Continue working carefully
B. Evacuate immediately and ventilate the space
C. Wait 5 minutes and recheck
D. Use a chemical mask instead
Rationale: Oxygen levels below 19.5% are considered unsafe; evacuation
and ventilation are required.
,7. Which of the following is a key principle of the “HazMat Life Cycle”?
A. Focus solely on decontamination
B. Avoid documenting exposures
C. Includes detection, identification, containment, and disposal
D. Only applies after an incident occurs
Rationale: The HazMat Life Cycle emphasizes a systematic approach to
detection, identification, containment, and disposal.
8. What is the most effective method for controlling a small flammable liquid
spill?
A. Dilution with water
B. Containment using absorbent materials and non-sparking tools
C. Ignition to burn off
D. Covering with sand only
Rationale: Absorbents and containment prevent spread and ignition; water
may worsen flammable liquid spills.
9. Under OSHA HAZWOPER standards, a HazMat Technician must receive
refresher training:
A. Every 5 years
B. Only when new chemicals are introduced
C. Annually
D. Every 6 months
Rationale: OSHA 29 CFR 1910.120 requires annual refresher training for
HazMat Technicians.
10.A tanker truck carrying an unknown chemical is involved in a collision. The
initial field identification shows the chemical is strongly oxidizing. The
technician should:
A. Neutralize the chemical with an acid immediately
, B. Isolate the area and prevent ignition sources
C. Attempt to transfer the chemical to another container immediately
D. Ignore containment and focus on traffic control
Rationale: Oxidizers can intensify fire; isolating the area and eliminating
ignition sources is the safest initial response.
11.The ERG (Emergency Response Guidebook) is primarily used to:
A. File reports to regulatory agencies
B. Provide initial action guidance during transportation incidents
C. Determine insurance liability
D. Train personnel only in laboratories
Rationale: The ERG is designed for first responders to provide immediate
guidance for placard or ID-numbered hazardous materials.
12.When responding to a hazardous chemical spill, which PPE level is
considered minimum for unknown vapor hazards?
A. Level D
B. Level C
C. Level B
D. Level A
Rationale: Level B provides maximum respiratory protection without full
skin protection, suitable for unknown vapors.
13.Which chemical property determines whether a spill will float or sink in
water?
A. Boiling point
B. Vapor density
C. Specific gravity
D. Flashpoint
ACTUAL QUESTIONS AND ANSWERS - LATEST
AND COMPLETE UPDATE WITH VERIFIED
SOLUTIONS – ASSURED PASS WITH INSTANT
DOWNLOAD PDF.
1. What is the primary purpose of a Material Safety Data Sheet (MSDS) or
Safety Data Sheet (SDS)?
A. To provide a list of suppliers for the chemical
B. To outline emergency response procedures only
C. To provide comprehensive information on chemical properties,
hazards, and safe handling
D. To report regulatory violations to authorities
Rationale: SDS contains detailed information about chemical properties,
hazards, protective measures, and emergency procedures, essential for safe
handling and response.
2. Which NFPA 704 diamond color represents health hazards?
A. Yellow
B. Blue
C. Red
D. White
Rationale: In NFPA 704, blue indicates health hazards, red is flammability,
yellow is reactivity, and white is special information.
3. A tanker truck carrying chlorine gas is leaking at a highway intersection.
What is the first step for a HazMat Technician on arrival?
A. Attempt to stop the leak immediately
B. Evacuate the surrounding area only
, C. Establish scene control and assess the situation from a safe distance
D. Enter the tank to inspect the leak
Rationale: Scene safety and assessment from a safe distance is always the
first step to prevent exposure before mitigation.
4. Which respiratory protection is required for a known IDLH chlorine gas
release?
A. Half-mask air-purifying respirator
B. PAPR with chemical cartridges
C. Self-contained breathing apparatus (SCBA)
D. N95 respirator
Rationale: IDLH (Immediately Dangerous to Life or Health) atmospheres
require SCBA for full protection.
5. The term “vapor density” refers to:
A. The weight of a vapor relative to water
B. The weight of a vapor relative to air
C. The volume of vapor produced at standard temperature
D. The flammability limit of a vapor
Rationale: Vapor density compares the weight of a vapor to air; values >1
indicate the vapor will sink.
6. During a confined space HazMat entry, continuous monitoring indicates
oxygen levels dropping below 19.5%. The technician should:
A. Continue working carefully
B. Evacuate immediately and ventilate the space
C. Wait 5 minutes and recheck
D. Use a chemical mask instead
Rationale: Oxygen levels below 19.5% are considered unsafe; evacuation
and ventilation are required.
,7. Which of the following is a key principle of the “HazMat Life Cycle”?
A. Focus solely on decontamination
B. Avoid documenting exposures
C. Includes detection, identification, containment, and disposal
D. Only applies after an incident occurs
Rationale: The HazMat Life Cycle emphasizes a systematic approach to
detection, identification, containment, and disposal.
8. What is the most effective method for controlling a small flammable liquid
spill?
A. Dilution with water
B. Containment using absorbent materials and non-sparking tools
C. Ignition to burn off
D. Covering with sand only
Rationale: Absorbents and containment prevent spread and ignition; water
may worsen flammable liquid spills.
9. Under OSHA HAZWOPER standards, a HazMat Technician must receive
refresher training:
A. Every 5 years
B. Only when new chemicals are introduced
C. Annually
D. Every 6 months
Rationale: OSHA 29 CFR 1910.120 requires annual refresher training for
HazMat Technicians.
10.A tanker truck carrying an unknown chemical is involved in a collision. The
initial field identification shows the chemical is strongly oxidizing. The
technician should:
A. Neutralize the chemical with an acid immediately
, B. Isolate the area and prevent ignition sources
C. Attempt to transfer the chemical to another container immediately
D. Ignore containment and focus on traffic control
Rationale: Oxidizers can intensify fire; isolating the area and eliminating
ignition sources is the safest initial response.
11.The ERG (Emergency Response Guidebook) is primarily used to:
A. File reports to regulatory agencies
B. Provide initial action guidance during transportation incidents
C. Determine insurance liability
D. Train personnel only in laboratories
Rationale: The ERG is designed for first responders to provide immediate
guidance for placard or ID-numbered hazardous materials.
12.When responding to a hazardous chemical spill, which PPE level is
considered minimum for unknown vapor hazards?
A. Level D
B. Level C
C. Level B
D. Level A
Rationale: Level B provides maximum respiratory protection without full
skin protection, suitable for unknown vapors.
13.Which chemical property determines whether a spill will float or sink in
water?
A. Boiling point
B. Vapor density
C. Specific gravity
D. Flashpoint
