HazMat HazMat Placarding and Labeling 3 — Questions and Answers
Question 1: Which placard class number represents explosives?
- Class 1 (Correct answer)
- Class 2
- Class 3
- Class 4
Correct answer: Class 1
Class 1 is the hazard class for explosives, subdivided into Divisions 1.1 through 1.6 based on explosion risk.
Question 2: What must you do if you discover a placard is damaged or unreadable during a trip?
- Continue to destination
- Replace the placard before moving the vehicle if safe to do so (Correct answer)
- Call your dispatcher and wait for instructions
- Cover the damaged placard with tape
Correct answer: Replace the placard before moving the vehicle if safe to do so
Regulations require placards to be legible and in good condition; damaged or unreadable placards must be replaced before continuing when safe.
Question 3: Which hazard class uses a yellow background placard?
- Flammable liquids
- Oxidizers and organic peroxides (Correct answer)
- Corrosives
- Poisons
Correct answer: Oxidizers and organic peroxides
Oxidizers (Class 5.1) and organic peroxides (Class 5.2) use yellow background placards to indicate their oxidizing potential.
Question 4: How far must a placard be visible from?
- 25 feet
- 50 feet
- 100 feet (Correct answer)
- There is no specific distance requirement in federal regulations
Correct answer: 100 feet
Placards must be visible from a distance of at least 100 feet under normal conditions to provide adequate warning to others.
Question 5: What is required when transporting Division 1.1 or 1.2 explosives?
- Standard placard is sufficient
- EXPLOSIVES 1.1 or 1.2 placard plus a DANGEROUS placard on the rear
- EXPLOSIVES A or B placard plus a written permit
- Specific EXPLOSIVES 1.1 or 1.2 placard and no other class placard (Correct answer)
Correct answer: Specific EXPLOSIVES 1.1 or 1.2 placard and no other class placard
Division 1.1 and 1.2 explosives require specific placards (EXPLOSIVES 1.1 or EXPLOSIVES 1.2) and regulations prohibit using a DANGEROUS placard for these materials.
Question 6: Which marking must appear on both the shipping paper and the package when transporting marine pollutants?
- MARINE POLLUTANT or the fish-and-tree symbol (Correct answer)
- WATER HAZARD label
- ENVIRONMENTAL HAZARD label
- AQUATIC DANGER marking
Correct answer: MARINE POLLUTANT or the fish-and-tree symbol
Marine pollutants must be identified with the words MARINE POLLUTANT or the fish-and-dead-tree symbol on both packages and shipping papers.
HazMat HazMat Placarding and Labeling 3
Which placard class number represents explosives?