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2025 FIREFIGHTER HAZMAT OPS FINAL
EXAM LATEST REAL QUESTIONS AND
CORRECT ANSWERS GRADE A
Hazardous Material - CORRECT ANSWER Any substance or
material that is capable of posing a unreasonable risk to human health, safety, or the environment when transported in commerce, used incorrectly, or not properly contained or stored
WMD(Weapon Of Mass Destruction - CORRECT ANSWER
Weapons whose use is intended to cause mass causalities, damage, and chaos. (NFPA classifies as hazardous material )
Neurotoxin - CORRECT ANSWER This type of chemical causes
damage to the nervous system
NFPA Standard 704 - CORRECT ANSWER Container marking that
is used for fixed facilities
Corrosivity(Ph) - CORRECT ANSWER A measure of a substance's
tendency to deteriorate in the presence of another substance or in a particular environment
Lower Explosive Limit(LEL) - CORRECT ANSWER The minimum
concentration of vapor to air below which a flame will not propagate in the presence of an ignition source
Upper Explosive Limit(UEL) - CORRECT ANSWER The maximum
vapor to air concentration above which a flame will not propagate
Flash Point - CORRECT ANSWER The temperature at which a
liquid will give off sufficient vapors that will ignite readily given an ignition source
Specific Gravity - CORRECT ANSWER Ratio of the weight of a
liquid or solid as compared to an equal amount of water
Persistence - CORRECT ANSWER A materials ability to stay within
the area of release for a long period of time
Particle Size - CORRECT ANSWER Refers to solids, and is
expressed in microns or percent passing through a meshed screen
Ignition Temperature/ - CORRECT ANSWER The minimum
temperature required to cause self-sustained combustion in the absence of any source of ignition
D.O.T Class 1 Hazardous Materials - CORRECT ANSWER
Explosives
D.O.T Class 2 Hazardous Materials - CORRECT ANSWER
Gases
D.O.T Class 3 Hazardous Materials - CORRECT ANSWER
Flammable/Combustible Liquids
D.O.T Class 4 Hazardous Materials - CORRECT ANSWER
Flammable solids/ spontaneously combustible materials/ dangerous- when-wet materials/water-reactive substances
D.O.T Class 5 Hazardous Materials - CORRECT ANSWER
Oxidizing Substances/Organic Peroxides
You're driving alongside the railroad tracks and see a tank car with a white body and two red vertical bands. A label on the tank reads "HIGHLY TOXIC." You have just seen a: -
CORRECT ANSWER Pressure railway tank car
Strong, tight packages are designed to transport radioactive materials
with: - CORRECT ANSWER Low radioactivity such as natural
uranium and rubble from nuclear reactors and packaged in steel, wood, or fiberboard Intermodal equipment, including tank containers will have all of the
markings below EXCEPT: - CORRECT ANSWER A three-letter
abbreviation for the owner, followed by an "X" and numbers As you survey an incident, you DO NOT need to consider: -
CORRECT ANSWER Drainage capacity
CHEMTREC has access to all of the following resources
EXCEPT the: - CORRECT ANSWER Chemical Mixers
Association Information about the role of local, state, and Federal authorities
during hazardous materials emergencies can be found: - CORRECT
ANSWER In the local emergency response plan
You are at a HazMat incident that you suspect involves criminal or terrorist activity. There are munitions involved and you need an Explosives Ordinance Disposal team to respond to the scene. The
agency that can help you with this is the: - CORRECT ANSWER
U.S. Army Operations Center
A material's flash point is the primary characteristic used to determine
its relative degree of: - CORRECT ANSWER
Flammability When radioactive contamination occurs and the person is removed
from the endangered area: - CORRECT ANSWER The
contaminated material ingested or inhaled continues to emit radiation A chemical inside a container has come into contact with an incompatible substance and is now degrading its own container. When Responder Watson describes the situation to CHEMTREC,
Watson refers to: - CORRECT ANSWER
Chemical Stress The type of release that is associated with runaway cracking is: -
CORRECT ANSWER Violent rupture
A material that is not necessarily toxic but can cause unconsciousness and death by displacing or depriving oxygen is
known as a(n): - CORRECT ANSWER Asphyxiant
Exposure to a high dose of radiation for a short time is considered: -
CORRECT ANSWER Acute
If the intensity of the incident increases and could pose an unreasonable threat to the responders at the scene, the responders
should: - CORRECT ANSWER Pull back from the rescue effort
To find out the distances for evacuation at a HazMat incident, use the Emergency Response Guidebook to determine the size of the
endangered area. Another way to find out would be to: - CORRECT
ANSWER Contact
CHEMTREC
Operations level responder Grabbe is at a HazMat incident near Lake Eerie. Grabbe is ready to monitor the size of the perimeter of the hazard-control zones. Identify the TWO items he should take into account when making
these decisions. - CORRECT ANSWER 1. Weather conditions, wind
- Results of monitoring and sampling Responders Costas and Lopez are performing emergency decontamination at a HazMat incident. After removing the victim from
the contaminated area they should: - CORRECT ANSWER
Immediately wash any exposed body parts with flooding quantities of water The purpose of the Operations level goal, "implement the planned
response," is to: - CORRECT ANSWER Favorably change
outcomes while making sure they are consistent with local emergency response plans and the organization's standard operating procedures
A common hazard with dry bulk cargo tanks is: - CORRECT
ANSWER Static Charges
MC-306/DOT- 406 - CORRECT ANSWER Alcohol
MC-312/DOT- 412 - CORRECT ANSWER Corrosive Liquids
MC- 331 - CORRECT ANSWER LP Gasses
MC- 338 - CORRECT ANSWER Liquid Nitrogen
At an incident at a fixed facility, you notice a product name and an identification number stenciled on the container. The
ID number should relate to the: - CORRECT ANSWER Site
Plan Using the U.N. hazard class system, materials other than gas that are either known to be so toxic to humans as to afford a hazard to health during transport, OR in the absence of adequate data on human toxicity are presumed to be toxic to humans, would fall under: -
CORRECT ANSWER 6.
At a site, your binoculars aren't strong enough to read the numbers on the placard, but you do see a yellow and white placard with a
trefoil icon. These materials are probably from: - CORRECT
ANSWER Class 7
Once you have contacted CHEMTREC: - CORRECT ANSWER
CHEMTREC will have the shipper or manufacturer call you
Contamination occurs when: - CORRECT ANSWER Exposures
exceed intended limits and radioactive material is transferred to people, animals, or the environment All the following statements are true about nonionizing radiation
EXCEPT: - CORRECT ANSWER C. It cannot cause tissue damage
Identify FOUR examples of ionizing radiation. - CORRECT
ANSWER 1. X-Rays
- Gama Rays
- Alpha Particles
- Beta Particles The factors that influence harm include all of the following
EXCEPT: - CORRECT ANSWER Time of Day
Alpha Radiation - CORRECT ANSWER - not able to penetrate skin
- inhaled, ingested, or absorbed causes harm
- cannot penetrate gear, or clothing
- travels a short distance through air
Beta Radiation - CORRECT ANSWER - moderately penetrating
- turnout gear can provide some protection
Gamma Radiation - CORRECT ANSWER - penetrates most
materials and skin
- extreme harm Type of radiation that is best shielded with a material that contains a
high hydrogen content is: - CORRECT ANSWER
Neutron
Teratogen - CORRECT ANSWER Causes growth
abnormalities in embryos, or genetic modifications in cells
Carcinogen - CORRECT ANSWER Has been evaluated by the
International Agency for Research on Cancer
Mutagen - CORRECT ANSWER A chemical or physical agent that
interacts with DNA and causes a mutation.
IM-101 Portable Tank may contain - CORRECT ANSWER
corrosives, flammable liquids, toxics Identify THREE items found in the EXPOSURE
CONTROLS/PERSONAL PROTECTION section of an SDS - CORRECT
ANSWER Threshold limit values, Personal protective equipment,
Appropriate engineering controls
The U.N. hazard class division for the choking agent phosgene is -
CORRECT ANSWER 2.
Identify THREE ways in which you can identify materials stored at
fixed facilities. - CORRECT ANSWER - Labeling or markings -
NFPA 704 symbol
- pre-emergency plan Identify the THREE sources that can be used to verify information
obtained during a survey of a HazMat incident in the U.S. - CORRECT
ANSWER - Electronic databses
- CHEMTREC
- ERG
A short term contamination usually lasts: - CORRECT
ANSWER Minutes and Hours
Identify FOUR resources that an Operations level responder has available for use when determining the concentrations of a released hazardous material within an endangered area.
- CORRECT ANSWER - Adjacent Fire Departments
- Environmental Agencies
- Regional Hazmat Response Teams
- Health and Industrial hygene groups a ______ is best defined as a tank-within-a-tank with a stainless steel inner tank supported within a strong outer tank, with insulation in the space between the inner and outer tank A. low-pressure tnak car B. cryogenic liquid tank C. pressure tank car D. non pressure tank car without an expansion dome -
D. MC331 - CORRECT ANSWER D. MC
High pressure tank trucks A tank carrier designed to carry flammable liquids, combustible liquids, class B poisons, and liquid food products with vapor pressures up to 4 psi is an A. MC306 / DOT406 B. MC307 / DOT C. MC312 / DOT
D. MC331 - CORRECT ANSWER A. MC306 / DOT
Nonpressure cargo tank trucks A carboy may be used for transporting materials containing A. radioactive substances B. corrosives C. expolosives
D. poison gases - CORRECT ANSWER B. corrosives
as a responder trained to the operations level, one of the ways to verify chlorine could emit vapors is to: A. contact CHEMTREC for assistance B. enter the hot zone to read the label on the cylinder C. bring a chlorine monitor into the vapor cloup to check the reading D. apply water to the spill to determine if a gas cloud is formed -
CORRECT ANSWER A. contact CHEMTREC for assistance
packing used for transport with extremely low levels of radioactivity that present no risk to the public or environment is known as A. Type B B. Expected
C. industrial
D. Type A - CORRECT ANSWER B. Expected
type ________ packaging contains low-level commercial radioactive shipments in cardboard boxes, wooden crates, and metal drums: A. A B. B C. C
D. Industrial - CORRECT ANSWER A. Type A
Which is mandatory information found on a pestiside label? A. Environmental protection agency registration number B. flammability level C. national fire protection association 704 data
D. CHEMTREC phone number - CORRECT ANSWER A.
Environmental protection agency registration number The statement "Keep Away from Waterways," is found on a pesticide label. This statement is referred to as a(n): A. signal word B. precautionary statement C. pest control product warning
D. incompatibility statement - CORRECT ANSWER B.
precautionary statement the environmental protection agency (EPA) signal word - Warning - represents A. high level of toxicity
B. PEL
C. TLV-TWA
D. STEL - CORRECT ANSWER A. TLV-C
when exposed to heat or fire, a liquid with a low boiling point will A. less readily change to vapor than a liquid with a high boiling point B. spontaneously combust C. become more corrosive D. more readily change to vapor than a liquid with a high boiling point
- CORRECT ANSWER D. more readily change to vapor than a liquid with a high boiling point caustic sodium hydroxide and potassium hydroxide are examples of: A. Polymers B. Catalysts C. acids
D. Bases - CORRECT ANSWER D. Bases
The minimum temperature at which a liquid gives off sufficient vapors to form an ignitable mixture, with air near the surface is called the _______ point A. combustion B. ignition C. flash
D. fire - CORRECT ANSWER C. flash
radiation that can be stopped by a piece of paper consists of _________ particles A. Alpha
B. Beta C. Neuron
D. gamma - CORRECT ANSWER A. Alpha
Alpha particles can be described as A. large particles that pass through structural PPE B. ionizing rediation like X-rays C. particles with weight and mass D. deadly radiation as it cna pass through structural PPE -
CORRECT ANSWER C. particles with weight and mass
determining whether a vapor will rise or fall is commonly referred to as A. Vapor dispersion B. Vapor density C. Vaporization
D. Specific gravity - CORRECT ANSWER B. Vapor density Vapor
pressure of a substance at 100 Degrees F A. will remain the same substance at 68 Degrees B. always higher than the same substance at 68 degrees C. will be lower than the same substance at 68 degrees
D. will vary considerably at 68 degrees - CORRECT ANSWER
B. always higher than the same substance at 68 degrees The immediate concern when dealing with combustible liquid spills is to A. apply aqueous film forming foam to the combistible liquid B. prevent ignition of the fuel
B. burning sensation to the eyes C. convulsions
D. fluid in the lungs - CORRECT ANSWER B. burning sensations
to the eyes Toxic gases, blood agents, such as arsine and cyanogen chloride, would fall under which UN/DOT hazard class A. 1.1 B.
C. 6.
D. 2.3 - CORRECT ANSWER D. 2.
the products that IM101 intermodal portable tanks typically carry are A. molten sulfur B. flammable gases C. Flammable liquids
D. radioactive materials - CORRECT ANSWER C. flammable
liquids which DOT hazard class covers nerve agents used in chemical warfare A. DOT 6.3 B. DOT 6. C. DOT 6.
D. DOT 5.2 - CORRECT ANSWER B. DOT 6.
the physical destruction or decomposition of chemical protective clothing by a chemical action is called A. degradation
B. breakthrough time C. penetration
D. permeation - CORRECT ANSWER A. degradation
a process in which a material is added to soak up a hazardous material to prevent enlargement or spread of the contaminated area is known as A. Neutralization B. solidification C. adsorption
D. absorption - CORRECT ANSWER D. absorption
the chemical action involving the movement of chemicals, on a modular level, through intact materials best defines A. degradation B. breakthrough time C. penetration
D. permeation - CORRECT ANSWER D. permeation
when dealing with a level 3 incident, it is expected that evacuation of people will cover an area of A. several square blocks B. large scale evacuation C. one mile upwind
D. one block in each direction - CORRECT ANSWER B.
large scale evacuation when sheltering people in place, the citizens should be directed to
