Cooperative Personnel Services Firefighter (CPS) Practice Exam

When the KST value is greater than 300, it indicates a specific type of hazard related to combustible dust. The KST value, which represents the dust deflagration index, is a measure of the explosiveness of dust when it is dispersed in the air. A higher KST value signifies that the dust is more likely to cause a greater explosion risk under the right conditions.

In this context, when the KST exceeds 300, it typically suggests an increased potential for explosive reactions, thus indicating a higher hazard level. Facilities and safety professionals must recognize this classification to implement appropriate safety measures and mitigation strategies. This heightened awareness helps prevent incidents and manage risks associated with storing, handling, or processing such dust materials.

The other options do not accurately reflect the implications of a high KST value; hence they do not convey the seriousness of the hazard represented.