HAZMAT TECH I EXAM QUESTIONS AND
ANSWERS LATEST 2025-2026 UPDATE
Toxicity - Answer-Chemicals or biological substances that cause
sickness, illness, or injury by doing damage on the molecular scale when
in contact with the body
T/F: The state of matter of the material being sampled will affect the
monitoring and detection techniques and devices used - Answer-True
Most gases ____ and _______ air - Answer-sink; displace
To properly determine concentrations of different gases, operate
monitoring and detection devices - Answer-- At different heights within
a room/area
- At different grades within a building
Verify monitoring and sampling results when possible by using -
Answer-- More than one sampling method
- More than one technology
When dealing with unknown materials or substances - Answer-Take an
analytic approach in attempting to identify and characterize hazards
, Always assume _____ ______ ______ hazard is present - Answer-more
than one
Hazardous Solids - Answer-- Will usually not travel far unless blown by
wind or dispersed by explosion
- Responders at hazmat incidents involving hazardous solids will
typically be sufficiently protected when using firefighter protective
equipment with SCBA or level C PPE
Hazardous Liquids may: - Answer-- Vaporize
- Expand rapidly
- Potentially travel great distances
- Fill low-level and confined spaces
Hazardous gases - Answer-Can expand rapidly, fill enclosed spaces,
and may travel great distances from their source
Corrosive gases can: - Answer-damage and penetrate firefighter
protective clothing and SCBA
Inert gases can: - Answer-displace oxygen levels in enclosed spaces
causing an asphyxiation hazard
•Before operating a device, responders should do: - Answer-
•Calibration Test (Bump Test)
,•Zeroing
Identify The Steps In An Analysis Process For Identifying An Unknown
Atmosphere - Answer-- Wear level A protective clothing
- Approach cautiously from upwind
Measure an unknown atmosphere in the following order - Answer-
•Radioactivity
•Combustibility
•Oxygen availability/deficiency
•pH, if liquid
•Hydrogen sulfide (if in areas of or adjacent to petroleum refining
activities)
•Carbon Monoxide
•Organic vapors
Hazmat Hazard detect and monitor in the following order: - Answer-
•Radiation
•Flammables
•Oxygen
•Corrosives
•Exothermic Reaction
•Toxics
•Oxidizers
, Roentgen Equivalent in Man (rem) - Answer-expresses the absorbed
dose equivalence as pertaining to a human body
applies to all types of radiation
millirem (mrem) - Answer-Smaller amounts of radiation exposure
Roentgen (R) - Answer-- Systems of units are used to measure and
express radiation exposure
- only measure exposure to gamma and X-ray radiation
Radiation absorbed dose (rad) - Answer-•expresses the amount of
radiation energy absorbed by a material
•Applies to any material and all types of radiation
Gray (Gy) - Answer-measure absorbed dose
SI System
Sievert (Sv) - Answer-measure dose equivalent
SI System
Emergency responders must always check for ____ - Answer-radiation
at explosive incidents
ANSWERS LATEST 2025-2026 UPDATE
Toxicity - Answer-Chemicals or biological substances that cause
sickness, illness, or injury by doing damage on the molecular scale when
in contact with the body
T/F: The state of matter of the material being sampled will affect the
monitoring and detection techniques and devices used - Answer-True
Most gases ____ and _______ air - Answer-sink; displace
To properly determine concentrations of different gases, operate
monitoring and detection devices - Answer-- At different heights within
a room/area
- At different grades within a building
Verify monitoring and sampling results when possible by using -
Answer-- More than one sampling method
- More than one technology
When dealing with unknown materials or substances - Answer-Take an
analytic approach in attempting to identify and characterize hazards
, Always assume _____ ______ ______ hazard is present - Answer-more
than one
Hazardous Solids - Answer-- Will usually not travel far unless blown by
wind or dispersed by explosion
- Responders at hazmat incidents involving hazardous solids will
typically be sufficiently protected when using firefighter protective
equipment with SCBA or level C PPE
Hazardous Liquids may: - Answer-- Vaporize
- Expand rapidly
- Potentially travel great distances
- Fill low-level and confined spaces
Hazardous gases - Answer-Can expand rapidly, fill enclosed spaces,
and may travel great distances from their source
Corrosive gases can: - Answer-damage and penetrate firefighter
protective clothing and SCBA
Inert gases can: - Answer-displace oxygen levels in enclosed spaces
causing an asphyxiation hazard
•Before operating a device, responders should do: - Answer-
•Calibration Test (Bump Test)
,•Zeroing
Identify The Steps In An Analysis Process For Identifying An Unknown
Atmosphere - Answer-- Wear level A protective clothing
- Approach cautiously from upwind
Measure an unknown atmosphere in the following order - Answer-
•Radioactivity
•Combustibility
•Oxygen availability/deficiency
•pH, if liquid
•Hydrogen sulfide (if in areas of or adjacent to petroleum refining
activities)
•Carbon Monoxide
•Organic vapors
Hazmat Hazard detect and monitor in the following order: - Answer-
•Radiation
•Flammables
•Oxygen
•Corrosives
•Exothermic Reaction
•Toxics
•Oxidizers
, Roentgen Equivalent in Man (rem) - Answer-expresses the absorbed
dose equivalence as pertaining to a human body
applies to all types of radiation
millirem (mrem) - Answer-Smaller amounts of radiation exposure
Roentgen (R) - Answer-- Systems of units are used to measure and
express radiation exposure
- only measure exposure to gamma and X-ray radiation
Radiation absorbed dose (rad) - Answer-•expresses the amount of
radiation energy absorbed by a material
•Applies to any material and all types of radiation
Gray (Gy) - Answer-measure absorbed dose
SI System
Sievert (Sv) - Answer-measure dose equivalent
SI System
Emergency responders must always check for ____ - Answer-radiation
at explosive incidents
