Firefighter HAZMAT OPS Exam
2025 – Actual 150 Questions with
Verified Correct Detailed Answers
[Graded A+ by Experts]
1. What describes the nature of a material and the behaviors and interactions that occur at
a molecular level?
A. Physical properties
B. Covalent properties
C. Chemical properties
D. Mechanical properties - CORRECT ANSWER>>>>C: Chemicial Properties
2. During rescue operations, will perform the actual search, rescue and removal of
victims from the hazardous area.
A. The unit leader
B. Medical responders
C. Entry team members
D. Backup team members - CORRECT ANSWER>>>>C: Entry team members
3. Who must operate under the guidance of a hazmat technician, SOP/G or an allied
professional when conducting technical decontamination?
A. Ambulatory victims
B. Technical level responders
C. Operations level responders
D. Responders being contaminated - CORRECT ANSWER>>>>C: Operations level responders
4. During technical decontamination operations, typically perform such duties as setting
up the decon corridor, assisting in doffing of PPE, and performing physical decontamination
activities.
A. Allied professional specialists
B. Awareness Level responders
C. Operations Level Responders
,D. Hazardous Materials Technicians - CORRECT ANSWER>>>>C: Operations
level responders
5. Responders can use potassium iodide (KI) starch paper to
test: A. The pH of unknown chemicals.
B. The concentration of toxic materials.
C. The oxidizing potential of unknown chemicals.
D. For presence of fluoride ions and gaseous hydrogen fluoride. - CORRECT
ANSWER>>>>A: the pH of unknown chemicals
6. Dome roof tanks, spheroid tanks, and noded spheroid tanks are types of bulk facility
storage tanks.
A. Atmospheric
B. Floating Roof
C. Low Pressure
D. Cryogenic Liquid - CORRECT ANSWER>>>>C: Low Pressure
7. Where can responders typically find emergency shutoff devices on corrosive liquid
tanks (MC/DOT 312)?
A. In the control box under the tank.
B. In the loading/unloading area near valves and piping.
C. Behind the driver's side cab and on the left rear corner.
D. Corrosive liquid tanks do NOT typically have emergency shutoff devices. - CORRECT
ANSWER>>>>D: Corrosive liquid tanks do NOT typically have emergency shutoff devices
8. What will provide the scene control required at hazmat and terrorist incidents to prevent
interference by unauthorized persons, minimize contamination, and help ensure accountability
of all personnel?
A. Areas of safe refuge.
B. Hazard control zones.
C. Decontamination corridors.
D. Personnel-tracking systems. - CORRECT ANSWER>>>>B: Hazard control zones
9. What assistance can be provided by Disaster Medical Assistance Teams (DMAT)?
A. Provide emergency medical care during a disaster or other event.
B. Provide technical assistance and personnel to recover, identity, and process deceased
victims. C. Manage large and/or complex incidents by providing full logistical support for
receiving and distribution centers.
D. Locate and extract victims from a contaminated environment, perform mass patient/casualty
decontamination, and provide treatment as necessary to stabilize patients for evacuation. -
CORRECT ANSWER>>>>A: Provide emergency medical care during a disaster of other event
, Under NIMS-ICS Command organization, the Safety Officer:
A. Must be trained to the Hazardous Materials Technician level at all incidents.
B. Is responsible for identifying the materials or conditions involved in the incident.
C. May exercise emergency authority to stop or prevent unsafe acts when immediate action
is required.
D. Must implement a site security and control plan to limit the number of personnel operating
in control zone. - CORRECT ANSWER>>>>C. May exercise emergency authority to stop or
prevent unsafe acts when immediate action is required.
At large hazardous materials incidents, what section of NIMS-ICS gathers, assimilates,
analyzes, and processes information needed for effective decision making.
A. Planning
B. Logistics
C. Operations
D. Intelligence and Information - CORRECT ANSWER>>>>A: Planning
Which statement about transferring command is accurate?
A. The person assuming command must conduct their own size-up to gain as clear of a picture
of the situation as possible.
B. Command can be transferred face-to face over the radio, but only to someone within the
IC's company, organization, or agency.
C. Before transferring command, the IC must ensure that the new IC is both capable of
assuming command and willing to accept command.
D. Command may be transferred only once, as an incident grows larger, the IC may need to
delegate tasks to experienced assistants to help bring the situation under control. -
CORRECT ANSWER>>>>C: Before transferring command, the IC must ensure that the
new IC is both capable of assuming command and willing to accept command.
What detection and monitoring equipment is used to detect corrosive materials?
A. Gas-filled detectors
B. pH meters and pH paper
C. Photoionization detectors (PIDs)
D. Potassium iodide (KI) starch paper - CORRECT ANSWER>>>>B: pH meters and pH paper
Which type of tank truck transports liquids, including flammable /combustible liquids, mild
corrosives, and some toxic/poisons typically at pressures of 25 to 35 psi (172 to 241 kPa)?
A. Compressed gas/tube trailers.
B. High-pressure tank trucks (MC-331 cargo tanks)
C. Non-pressure cargo tank trucks (MC-306 or DOT/TC 406 cargo tanks)
D. Low pressure chemical tank trucks (MC-307 or DOT/TC 407 cargo tanks) - CORRECT
ANSWER>>>>D: Low pressure chemical tank trucks (MC-307 or DOT/TC 407 cargo tanks)
2025 – Actual 150 Questions with
Verified Correct Detailed Answers
[Graded A+ by Experts]
1. What describes the nature of a material and the behaviors and interactions that occur at
a molecular level?
A. Physical properties
B. Covalent properties
C. Chemical properties
D. Mechanical properties - CORRECT ANSWER>>>>C: Chemicial Properties
2. During rescue operations, will perform the actual search, rescue and removal of
victims from the hazardous area.
A. The unit leader
B. Medical responders
C. Entry team members
D. Backup team members - CORRECT ANSWER>>>>C: Entry team members
3. Who must operate under the guidance of a hazmat technician, SOP/G or an allied
professional when conducting technical decontamination?
A. Ambulatory victims
B. Technical level responders
C. Operations level responders
D. Responders being contaminated - CORRECT ANSWER>>>>C: Operations level responders
4. During technical decontamination operations, typically perform such duties as setting
up the decon corridor, assisting in doffing of PPE, and performing physical decontamination
activities.
A. Allied professional specialists
B. Awareness Level responders
C. Operations Level Responders
,D. Hazardous Materials Technicians - CORRECT ANSWER>>>>C: Operations
level responders
5. Responders can use potassium iodide (KI) starch paper to
test: A. The pH of unknown chemicals.
B. The concentration of toxic materials.
C. The oxidizing potential of unknown chemicals.
D. For presence of fluoride ions and gaseous hydrogen fluoride. - CORRECT
ANSWER>>>>A: the pH of unknown chemicals
6. Dome roof tanks, spheroid tanks, and noded spheroid tanks are types of bulk facility
storage tanks.
A. Atmospheric
B. Floating Roof
C. Low Pressure
D. Cryogenic Liquid - CORRECT ANSWER>>>>C: Low Pressure
7. Where can responders typically find emergency shutoff devices on corrosive liquid
tanks (MC/DOT 312)?
A. In the control box under the tank.
B. In the loading/unloading area near valves and piping.
C. Behind the driver's side cab and on the left rear corner.
D. Corrosive liquid tanks do NOT typically have emergency shutoff devices. - CORRECT
ANSWER>>>>D: Corrosive liquid tanks do NOT typically have emergency shutoff devices
8. What will provide the scene control required at hazmat and terrorist incidents to prevent
interference by unauthorized persons, minimize contamination, and help ensure accountability
of all personnel?
A. Areas of safe refuge.
B. Hazard control zones.
C. Decontamination corridors.
D. Personnel-tracking systems. - CORRECT ANSWER>>>>B: Hazard control zones
9. What assistance can be provided by Disaster Medical Assistance Teams (DMAT)?
A. Provide emergency medical care during a disaster or other event.
B. Provide technical assistance and personnel to recover, identity, and process deceased
victims. C. Manage large and/or complex incidents by providing full logistical support for
receiving and distribution centers.
D. Locate and extract victims from a contaminated environment, perform mass patient/casualty
decontamination, and provide treatment as necessary to stabilize patients for evacuation. -
CORRECT ANSWER>>>>A: Provide emergency medical care during a disaster of other event
, Under NIMS-ICS Command organization, the Safety Officer:
A. Must be trained to the Hazardous Materials Technician level at all incidents.
B. Is responsible for identifying the materials or conditions involved in the incident.
C. May exercise emergency authority to stop or prevent unsafe acts when immediate action
is required.
D. Must implement a site security and control plan to limit the number of personnel operating
in control zone. - CORRECT ANSWER>>>>C. May exercise emergency authority to stop or
prevent unsafe acts when immediate action is required.
At large hazardous materials incidents, what section of NIMS-ICS gathers, assimilates,
analyzes, and processes information needed for effective decision making.
A. Planning
B. Logistics
C. Operations
D. Intelligence and Information - CORRECT ANSWER>>>>A: Planning
Which statement about transferring command is accurate?
A. The person assuming command must conduct their own size-up to gain as clear of a picture
of the situation as possible.
B. Command can be transferred face-to face over the radio, but only to someone within the
IC's company, organization, or agency.
C. Before transferring command, the IC must ensure that the new IC is both capable of
assuming command and willing to accept command.
D. Command may be transferred only once, as an incident grows larger, the IC may need to
delegate tasks to experienced assistants to help bring the situation under control. -
CORRECT ANSWER>>>>C: Before transferring command, the IC must ensure that the
new IC is both capable of assuming command and willing to accept command.
What detection and monitoring equipment is used to detect corrosive materials?
A. Gas-filled detectors
B. pH meters and pH paper
C. Photoionization detectors (PIDs)
D. Potassium iodide (KI) starch paper - CORRECT ANSWER>>>>B: pH meters and pH paper
Which type of tank truck transports liquids, including flammable /combustible liquids, mild
corrosives, and some toxic/poisons typically at pressures of 25 to 35 psi (172 to 241 kPa)?
A. Compressed gas/tube trailers.
B. High-pressure tank trucks (MC-331 cargo tanks)
C. Non-pressure cargo tank trucks (MC-306 or DOT/TC 406 cargo tanks)
D. Low pressure chemical tank trucks (MC-307 or DOT/TC 407 cargo tanks) - CORRECT
ANSWER>>>>D: Low pressure chemical tank trucks (MC-307 or DOT/TC 407 cargo tanks)
