HazMat Awareness and Operations Exam
2026/2027 UPDATED QUESTIONS WITH
ANSWERS GRADED A+
• Regulation -✓✓ "Rules" created by Federal or state agencies
• Standards -✓✓ Voluntary consensus standards
• Law first regulated how emergency responders respond to hazardous materials
emergencies -✓✓ SARA
• Key information contained in a Tier 2 form -✓✓ -Location of chemical at the facility
-24hr contact number
• OSHA regulation governs hazardous materials response -✓✓ 29 CFR 1910.120
• 2 NFPA standards for hazardous materials -✓✓ NFPA 472 and 473
• Vapor pressure -✓✓ Pressure exerted on the inside of a closed container by the vapor
inside
• Vapor density -✓✓ Density of a particular gas or vapor relative to that of hydrogen at
the same pressure and temperature
• Specific gravity -✓✓ Compares the weight of a substance or material with an equal
volume of water
• Scale used for corrosives -✓✓ pH 0-14
• Flash point -✓✓ Minimum temperature at which a liquid fuel gives off sufficient vapors
to form an ignitable mixture with air
• Auto ignition temperature -✓✓ Minimum temperature required to cause self sustained
combustion in absence of any source of ignition
• Flammable range -✓✓ Upper flammable and lower flammable limit
• Exposure vs contamination -✓✓ Exposure: Actual or potential contact a responder
may have with a hazardous material
Contamination: Process of transferring a hazardous material from its source to people
• TRACEM -✓✓ Thermal
, Radiological
Asphyxiation
Chemical
Etiological
Mechanical
• Carcinogen -✓✓ Cancer causing, known and suspected
• Primary routes of exposure -✓✓ Inhalation
Ingestion
Penetration
Absorption
• Exposure limit enforceable by OSHA -✓✓ PEL
• Lethal dose vs Lethal concentration -✓✓ Lethal Dose: minimum dose of an ingested,
absorbed, or injected substance that will be fatal to the test group
Lethal concentration: minimum concentration of an inhaled substance in the gaseous
state that will be fatal to the test group
• SCBA -✓✓ Self contain breathing apparatus
• SAR -✓✓ Supplied Air Respirator, unlimited supply of air but limited to 300ft
• APR -✓✓ Air-Purifying Respirators, light weight, doesn't supply breathing air
• Levels of protection -✓✓ Level A: Protection is required when the greatest potential for
exposure to hazards exists
(SCBA), totally encapsulated chemical- and vapor-protective suit;
Level B: Protection is required under circumstances requiring the highest level of
respiratory protection
(SCBA), inner and outer chemical-resistant gloves;
face shield;
hooded chemical resistant clothing;
coveralls; and
outer chemical-resistant boots.
Level C protection is required when the concentration and type of airborne substances
is known and the criteria for using air purifying respirators is met.
full-face air purifying respirators;
inner and outer chemical-resistant gloves;
hard hat;
escape mask; and
disposable chemical-resistant outer boots.
2026/2027 UPDATED QUESTIONS WITH
ANSWERS GRADED A+
• Regulation -✓✓ "Rules" created by Federal or state agencies
• Standards -✓✓ Voluntary consensus standards
• Law first regulated how emergency responders respond to hazardous materials
emergencies -✓✓ SARA
• Key information contained in a Tier 2 form -✓✓ -Location of chemical at the facility
-24hr contact number
• OSHA regulation governs hazardous materials response -✓✓ 29 CFR 1910.120
• 2 NFPA standards for hazardous materials -✓✓ NFPA 472 and 473
• Vapor pressure -✓✓ Pressure exerted on the inside of a closed container by the vapor
inside
• Vapor density -✓✓ Density of a particular gas or vapor relative to that of hydrogen at
the same pressure and temperature
• Specific gravity -✓✓ Compares the weight of a substance or material with an equal
volume of water
• Scale used for corrosives -✓✓ pH 0-14
• Flash point -✓✓ Minimum temperature at which a liquid fuel gives off sufficient vapors
to form an ignitable mixture with air
• Auto ignition temperature -✓✓ Minimum temperature required to cause self sustained
combustion in absence of any source of ignition
• Flammable range -✓✓ Upper flammable and lower flammable limit
• Exposure vs contamination -✓✓ Exposure: Actual or potential contact a responder
may have with a hazardous material
Contamination: Process of transferring a hazardous material from its source to people
• TRACEM -✓✓ Thermal
, Radiological
Asphyxiation
Chemical
Etiological
Mechanical
• Carcinogen -✓✓ Cancer causing, known and suspected
• Primary routes of exposure -✓✓ Inhalation
Ingestion
Penetration
Absorption
• Exposure limit enforceable by OSHA -✓✓ PEL
• Lethal dose vs Lethal concentration -✓✓ Lethal Dose: minimum dose of an ingested,
absorbed, or injected substance that will be fatal to the test group
Lethal concentration: minimum concentration of an inhaled substance in the gaseous
state that will be fatal to the test group
• SCBA -✓✓ Self contain breathing apparatus
• SAR -✓✓ Supplied Air Respirator, unlimited supply of air but limited to 300ft
• APR -✓✓ Air-Purifying Respirators, light weight, doesn't supply breathing air
• Levels of protection -✓✓ Level A: Protection is required when the greatest potential for
exposure to hazards exists
(SCBA), totally encapsulated chemical- and vapor-protective suit;
Level B: Protection is required under circumstances requiring the highest level of
respiratory protection
(SCBA), inner and outer chemical-resistant gloves;
face shield;
hooded chemical resistant clothing;
coveralls; and
outer chemical-resistant boots.
Level C protection is required when the concentration and type of airborne substances
is known and the criteria for using air purifying respirators is met.
full-face air purifying respirators;
inner and outer chemical-resistant gloves;
hard hat;
escape mask; and
disposable chemical-resistant outer boots.
