Which type of license is not issued unless there is prior experience with a Type B license?

The Type R license requires prior experience with a Type B license as it is designed for individuals who have already demonstrated proficiency in handling certain types of fire extinguishers covered by the Type B license. This requirement ensures that candidates possess a foundational level of knowledge and practical skills, which are essential for handling more complex and powerful types of extinguishers encountered under the Type R licensing.

In this context, experience with a Type B license provides the necessary training and understanding of fire extinguisher operation, safety protocols, and emergency response. This foundational knowledge is crucial for the applications and responsibilities that come with a Type R license, which typically involves more advanced handling and use of specialized extinguishing agents. Requiring prior experience also helps to maintain safety standards and competency within the field.

In contrast, other licenses, such as the Type A, Type K, and even Type B licenses themselves, do not have such prerequisite experience requirements that advance to a higher level of training, thus clarifying the specific pathway necessitated for achieving a Type R license.