Which category of hazmat has a limit of 1.05 gallons or 18.8 lbs when traveling with passengers?

The correct category of hazmat with a limit of 1.05 gallons or 18.8 lbs when traveling with passengers is indeed Category B. This category is defined by the regulations governing the transport of hazardous materials, particularly in the context of passenger flights under Part 135 operations.

Category B materials have specific limitations set to ensure the safety of passengers and crew, as they present a lower risk compared to Category A. For Category B, the limits are intended to minimize the potential impact on safety while allowing certain essential materials to be transported for personal or operational use. In contrast, other categories have either higher limits or are subject to more stringent controls due to their increased risks.

Understanding these distinctions is crucial for flight operations, especially in the context of safety protocols and compliance with hazardous materials regulations. Proper identification and handling of these materials are essential to maintain safety standards in aviation settings.