Under the general passenger-vehicle quantity limit, what is the maximum gross weight of any one permitted non-Class 1 hazardous-material class?
Correct answer: B – 99 pounds (45 kilograms)
Federal regulations generally limit any given non-Class 1 hazardous-material class on a passenger-carrying vehicle to 45 kilograms, or 99 pounds, gross weight. The aggregate limit for all such materials is 225 kilograms, or 496 pounds. Separate provisions apply to certain refrigerants and secured cylinders.
Source: 49 CFR § 177.870(e) – Regulations for passenger carrying vehicles

