PlacardingQuestion 64 of 80
What does a placard with the word 'OXYGEN' or an oxidizer symbol warn responders about?
a.The material is flammable liquid
b.The material can intensify a fire by supplying oxygen
c.The material is radioactive
d.The material is a corrosive acid
Explanation
Oxidizers and oxygen placards warn that the material can supply oxygen and make fires burn hotter and faster. Responders must keep these materials away from fuels and flames. Recognizing the placard helps them plan a safe response.
Practice all 80 questions free — no signup required.
Related questions on this topic
- How close can a placard be to other signs or markings on the vehicle?
- What color is the flammable liquid (Class 3) placard?
- When must a placarded vehicle keep placards displayed?
- Why must a driver check that placards match the shipping papers?
- What is required for a placard's durability and appearance?
- If a shipment does not require placards, may the driver still need a hazmat endorsement?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against CDL Hazardous Materials (H) Endorsement Knowledge Test · How we review