Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
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DOT Class 1 - (ANSWER)Explosive
DOT Class 2 - (ANSWER)Compressed Gases ( cylinders )
DOT Class 3 - (ANSWER)Flammable liquids (FP < 140 degrees F)
DOT Class 4 - (ANSWER)Flammable Solids
DOT Class 5 - (ANSWER)Oxidizers
DOT Class 6 - (ANSWER)Poison Solids & liquids
DOT Class 7 - (ANSWER)Radioactive
DOT Class 8 - (ANSWER)Corrosives
DOT Class 9 - (ANSWER)Miscellaneous
Manufacturers Label Contains: - (ANSWER)Product name, Chemical names, Hazards, Precautions,
Storage Info, etc.
DOT Hazard Class Labels Hazardous Materials Identification System (HMIS) - (ANSWER)RED, BLUE,
ORANGE, WHITE
HMIS Red - (ANSWER)Flammability Rating
HMIS Blue - (ANSWER)Health Hazard Rating
,Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
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HMIS Orange - (ANSWER)Physical Hazard Rating
HMIS White - (ANSWER)Special Hazard Rating
National Fire Protection Association (NFPA) Labels - (ANSWER)RED, BLUE, YELLOW, WHITE
NFPA Red - (ANSWER)Flammability rating
NFPA Blue - (ANSWER)Health Hazard Rating
NFPA Yellow - (ANSWER)Instability Hazard Rating
NFPA White - (ANSWER)Special Hazard Rating
Placards Identify: - (ANSWER)The hazard class of the material and in some cases identify the DOT
identification number or UN Number
What weight of hazardous materials requires the vehicle to display placards on all four sides? -
(ANSWER)1000+Lbs
Other factors, which may indicate hazardous substances - (ANSWER)Locations, Colors, Container type or
shape
Safety Data Sheet (SDS) - (ANSWER)Information on a products hazardous ingredients, physical
properties, fire and explosion data, reactivity, health hazard data, precautions and use. Required to be
on hand for every chemical used or stored on site.
,Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
Questions And Correct Answers (Verified Answers)|Brand New Version!
Shipping Papers or Manifests - (ANSWER)Reffered to as bill of landing, are required for most hazardous
material shipments. Gives information about what it is and the hazards involved.
Toxicology Exposure Routes - (ANSWER)Inhalation, Skin Absorption, Ingestion, Injection
Inhalation - (ANSWER)Contaminates into the lungs
Most critical route of entry
Direct route to the blood stream
Safe Guards: Respiratory Protection
Absorption - (ANSWER)Upon Contact with the skin
Safe Guards: Chemical Protective Clothing
Ingestion - (ANSWER)Exposure to contaminate through eating or drinking
Safe guards: Good Hygiene Practices. Dont eat / drink in work zones. Wash Hands and face before
eating, drinking, smoking, etc.
Injection - (ANSWER)Direct penetration of contaminate by puncture
Safe guards: Work safely
Categories of Exposure - (ANSWER)Acute / Chronic
Acute - (ANSWER)Short-term exposure to high concentration of contaminants
Results of exposure are immediate, within 72 hrs
Examples: Illness, irritation, burns, sore throat, dizziness, headache, or death.
Chronic - (ANSWER)Exposure to lower concentration of contaminates over longer period of time
, Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
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Symptoms: occur years after exposure
Examples: cancer, kidney damage, lung damage.
Exposure Effects - (ANSWER)Local / Systematic
Local Effects: - (ANSWER)damage resulting where the chemical enters the body
Systematic effects: - (ANSWER)damage, which seeks a specific organ and causes damage at that point
Mutagen: - (ANSWER)a substance capable of inducing mutations in the DNA and in living cells
Teratogen: - (ANSWER)causes growth abnormalities in embryos
Carcinogen: - (ANSWER)Causes the development of cancerous growth in living tissue
Dose relationship - (ANSWER)Lethal Dose (LD50), Lethal Concentration (LC50), Permissible Exposure
Limit (PEL), Threshold Limit Value (TLV), Recommended Exposure Limit (REL), Immediately Dangerous to
Life or Health (IDLH)
Lethal Dose (LD50) - (ANSWER)The concentration of a substances that is expected to cause death of 50%
of the test population when exposed to that substances by any route other than inhalation. Oral or
dermal exposure
Lethal Concentration (LC50) - (ANSWER)The concentration of a substance that is expected to cause
death of 50% of the test population when exposed to that substance by inhalation
Permissible Exposure Limit (PEL) - (ANSWER)Maximum concentration of a substance that worker can be
exposed to over an 8 hour workday, 40 hour week. a list may be found in OSHA 29 CFR 1910.1000
Questions And Correct Answers (Verified Answers)|Brand New Version!
DOT Class 1 - (ANSWER)Explosive
DOT Class 2 - (ANSWER)Compressed Gases ( cylinders )
DOT Class 3 - (ANSWER)Flammable liquids (FP < 140 degrees F)
DOT Class 4 - (ANSWER)Flammable Solids
DOT Class 5 - (ANSWER)Oxidizers
DOT Class 6 - (ANSWER)Poison Solids & liquids
DOT Class 7 - (ANSWER)Radioactive
DOT Class 8 - (ANSWER)Corrosives
DOT Class 9 - (ANSWER)Miscellaneous
Manufacturers Label Contains: - (ANSWER)Product name, Chemical names, Hazards, Precautions,
Storage Info, etc.
DOT Hazard Class Labels Hazardous Materials Identification System (HMIS) - (ANSWER)RED, BLUE,
ORANGE, WHITE
HMIS Red - (ANSWER)Flammability Rating
HMIS Blue - (ANSWER)Health Hazard Rating
,Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
Questions And Correct Answers (Verified Answers)|Brand New Version!
HMIS Orange - (ANSWER)Physical Hazard Rating
HMIS White - (ANSWER)Special Hazard Rating
National Fire Protection Association (NFPA) Labels - (ANSWER)RED, BLUE, YELLOW, WHITE
NFPA Red - (ANSWER)Flammability rating
NFPA Blue - (ANSWER)Health Hazard Rating
NFPA Yellow - (ANSWER)Instability Hazard Rating
NFPA White - (ANSWER)Special Hazard Rating
Placards Identify: - (ANSWER)The hazard class of the material and in some cases identify the DOT
identification number or UN Number
What weight of hazardous materials requires the vehicle to display placards on all four sides? -
(ANSWER)1000+Lbs
Other factors, which may indicate hazardous substances - (ANSWER)Locations, Colors, Container type or
shape
Safety Data Sheet (SDS) - (ANSWER)Information on a products hazardous ingredients, physical
properties, fire and explosion data, reactivity, health hazard data, precautions and use. Required to be
on hand for every chemical used or stored on site.
,Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
Questions And Correct Answers (Verified Answers)|Brand New Version!
Shipping Papers or Manifests - (ANSWER)Reffered to as bill of landing, are required for most hazardous
material shipments. Gives information about what it is and the hazards involved.
Toxicology Exposure Routes - (ANSWER)Inhalation, Skin Absorption, Ingestion, Injection
Inhalation - (ANSWER)Contaminates into the lungs
Most critical route of entry
Direct route to the blood stream
Safe Guards: Respiratory Protection
Absorption - (ANSWER)Upon Contact with the skin
Safe Guards: Chemical Protective Clothing
Ingestion - (ANSWER)Exposure to contaminate through eating or drinking
Safe guards: Good Hygiene Practices. Dont eat / drink in work zones. Wash Hands and face before
eating, drinking, smoking, etc.
Injection - (ANSWER)Direct penetration of contaminate by puncture
Safe guards: Work safely
Categories of Exposure - (ANSWER)Acute / Chronic
Acute - (ANSWER)Short-term exposure to high concentration of contaminants
Results of exposure are immediate, within 72 hrs
Examples: Illness, irritation, burns, sore throat, dizziness, headache, or death.
Chronic - (ANSWER)Exposure to lower concentration of contaminates over longer period of time
, Hazwoper 8 hour Refresher Actual Exam Prep Material Newest 2025/2026 Complete
Questions And Correct Answers (Verified Answers)|Brand New Version!
Symptoms: occur years after exposure
Examples: cancer, kidney damage, lung damage.
Exposure Effects - (ANSWER)Local / Systematic
Local Effects: - (ANSWER)damage resulting where the chemical enters the body
Systematic effects: - (ANSWER)damage, which seeks a specific organ and causes damage at that point
Mutagen: - (ANSWER)a substance capable of inducing mutations in the DNA and in living cells
Teratogen: - (ANSWER)causes growth abnormalities in embryos
Carcinogen: - (ANSWER)Causes the development of cancerous growth in living tissue
Dose relationship - (ANSWER)Lethal Dose (LD50), Lethal Concentration (LC50), Permissible Exposure
Limit (PEL), Threshold Limit Value (TLV), Recommended Exposure Limit (REL), Immediately Dangerous to
Life or Health (IDLH)
Lethal Dose (LD50) - (ANSWER)The concentration of a substances that is expected to cause death of 50%
of the test population when exposed to that substances by any route other than inhalation. Oral or
dermal exposure
Lethal Concentration (LC50) - (ANSWER)The concentration of a substance that is expected to cause
death of 50% of the test population when exposed to that substance by inhalation
Permissible Exposure Limit (PEL) - (ANSWER)Maximum concentration of a substance that worker can be
exposed to over an 8 hour workday, 40 hour week. a list may be found in OSHA 29 CFR 1910.1000
