A tractor-trailer carrying 975 lbs of organic peroxides, other than Type B, requires:

A tractor-trailer carrying 975 lbs of organic peroxides, other than Type B, requires:

• A. A red flammable placard
• B. No placard
• C. A warning placard
• D. A corrosion placard

Answer: (B)

The key idea is that placards depend on both the hazard class and the amount being shipped. Organic peroxides fall under Class 5.2, and for non-Type B organic peroxides, a placard is required only when the quantity on a vehicle reaches 1,001 pounds or more. Since this shipment has 975 pounds, it does not meet the threshold, so no placard is required. If it were Type B, the rules would differ, but the scenario specifies non-Type B, so the 975-pound load stays below the placarding trigger. The red flammable placard and the corrosion placard are for different hazard types, and a separate “warning placard” isn’t the standard requirement here, so they aren’t applicable in this case.

The key idea is that placards depend on both the hazard class and the amount being shipped. Organic peroxides fall under Class 5.2, and for non-Type B organic peroxides, a placard is required only when the quantity on a vehicle reaches 1,001 pounds or more. Since this shipment has 975 pounds, it does not meet the threshold, so no placard is required. If it were Type B, the rules would differ, but the scenario specifies non-Type B, so the 975-pound load stays below the placarding trigger. The red flammable placard and the corrosion placard are for different hazard types, and a separate “warning placard” isn’t the standard requirement here, so they aren’t applicable in this case.