HAZMAT Tech Exam Questions With
Correct Answers Graded A+
Corrosives Hazards☑️Correct Ans-- are materials that destroy living tissue and damage or
destroy metal
- Two categories: acids and bases
Explosivity☑️Correct Ans-is any substance or article with a great deal of potential energy that
may rapidly expand and release upon activation (undergo an explosion)
Reactivity☑️Correct Ans-describes its relative ability to undergo a chemical reaction with itself
or other materials
Radioactivity☑️Correct Ans-- The least energetic form of radiation is nonionizing radiation
such as visible light and radio waves.
- The most energetic (and hazardous) form of radiation is ionizing radiation
Flammability☑️Correct Ans-Fuels susceptibility to ignition
Normal Atmospheric Conditions☑️Correct Ans-19.5%-23.5%
Oxygen Deficient☑️Correct Ans-19.5%
Oxygen Enriched☑️Correct Ans-23.5%
Thermal Hazard - Heat☑️Correct Ans-•Hazardous material can cause temperature extremes.
•Fires, explosions involving flammable liquids, explosive materials can cause burns
,Thermal Hazard - Cold☑️Correct Ans-•Lack of heat can also cause harm; cryogenic liquids,
liquefied gases are so cold that if contacted, they can cause damage, injuries.
•Cold atmospheric temperatures can complicate many hazmat operations
Toxicity☑️Correct Ans-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☑️Correct Ans-True
Most gases ____ and _______ air☑️Correct Ans-sink; displace
To properly determine concentrations of different gases, operate monitoring and detection
devices☑️Correct Ans-- At different heights within a room/area
- At different grades within a building
Verify monitoring and sampling results when possible by using☑️Correct Ans-- More than one
sampling method
- More than one technology
When dealing with unknown materials or substances☑️Correct Ans-Take an analytic approach
in attempting to identify and characterize hazards
Always assume _____ ______ ______ hazard is present☑️Correct Ans-more than one
Hazardous Solids☑️Correct Ans-- 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:☑️Correct Ans-- Vaporize
- Expand rapidly
- Potentially travel great distances
- Fill low-level and confined spaces
Hazardous gases☑️Correct Ans-Can expand rapidly, fill enclosed spaces, and may travel great
distances from their source
Corrosive gases can:☑️Correct Ans-damage and penetrate firefighter protective clothing and
SCBA
Inert gases can:☑️Correct Ans-displace oxygen levels in enclosed spaces causing an
asphyxiation hazard
•Before operating a device, responders should do:☑️Correct Ans-•Calibration Test (Bump Test)
•Zeroing
Identify The Steps In An Analysis Process For Identifying An Unknown Atmosphere☑️Correct
Ans-- Wear level A protective clothing
- Approach cautiously from upwind
Measure an unknown atmosphere in the following order☑️Correct Ans-•Radioactivity
•Combustibility
•Oxygen availability/deficiency
•pH, if liquid
•Hydrogen sulfide (if in areas of or adjacent to petroleum refining activities)
•Carbon Monoxide
•Organic vapors
Correct Answers Graded A+
Corrosives Hazards☑️Correct Ans-- are materials that destroy living tissue and damage or
destroy metal
- Two categories: acids and bases
Explosivity☑️Correct Ans-is any substance or article with a great deal of potential energy that
may rapidly expand and release upon activation (undergo an explosion)
Reactivity☑️Correct Ans-describes its relative ability to undergo a chemical reaction with itself
or other materials
Radioactivity☑️Correct Ans-- The least energetic form of radiation is nonionizing radiation
such as visible light and radio waves.
- The most energetic (and hazardous) form of radiation is ionizing radiation
Flammability☑️Correct Ans-Fuels susceptibility to ignition
Normal Atmospheric Conditions☑️Correct Ans-19.5%-23.5%
Oxygen Deficient☑️Correct Ans-19.5%
Oxygen Enriched☑️Correct Ans-23.5%
Thermal Hazard - Heat☑️Correct Ans-•Hazardous material can cause temperature extremes.
•Fires, explosions involving flammable liquids, explosive materials can cause burns
,Thermal Hazard - Cold☑️Correct Ans-•Lack of heat can also cause harm; cryogenic liquids,
liquefied gases are so cold that if contacted, they can cause damage, injuries.
•Cold atmospheric temperatures can complicate many hazmat operations
Toxicity☑️Correct Ans-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☑️Correct Ans-True
Most gases ____ and _______ air☑️Correct Ans-sink; displace
To properly determine concentrations of different gases, operate monitoring and detection
devices☑️Correct Ans-- At different heights within a room/area
- At different grades within a building
Verify monitoring and sampling results when possible by using☑️Correct Ans-- More than one
sampling method
- More than one technology
When dealing with unknown materials or substances☑️Correct Ans-Take an analytic approach
in attempting to identify and characterize hazards
Always assume _____ ______ ______ hazard is present☑️Correct Ans-more than one
Hazardous Solids☑️Correct Ans-- 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:☑️Correct Ans-- Vaporize
- Expand rapidly
- Potentially travel great distances
- Fill low-level and confined spaces
Hazardous gases☑️Correct Ans-Can expand rapidly, fill enclosed spaces, and may travel great
distances from their source
Corrosive gases can:☑️Correct Ans-damage and penetrate firefighter protective clothing and
SCBA
Inert gases can:☑️Correct Ans-displace oxygen levels in enclosed spaces causing an
asphyxiation hazard
•Before operating a device, responders should do:☑️Correct Ans-•Calibration Test (Bump Test)
•Zeroing
Identify The Steps In An Analysis Process For Identifying An Unknown Atmosphere☑️Correct
Ans-- Wear level A protective clothing
- Approach cautiously from upwind
Measure an unknown atmosphere in the following order☑️Correct Ans-•Radioactivity
•Combustibility
•Oxygen availability/deficiency
•pH, if liquid
•Hydrogen sulfide (if in areas of or adjacent to petroleum refining activities)
•Carbon Monoxide
•Organic vapors
