Cooperative Personnel Services Firefighter (CPS) Practice Exam

Question: 1 / 400

What does the term Kst measure in explosion dynamics?

The speed of combustion

The pressure of ignited materials

The energetics of deflagration

Kst is a measurement that quantifies the explosiveness of a dust cloud in explosion dynamics. It specifically refers to the characteristic of how energetic a dust deflagration is when it burns in a confined space. The term "deflagration" indicates a subsonic combustion process where the speed of the reaction is slower than the speed of sound in the surrounding medium.

When conducting safety assessments for facilities handling combustible dust, Kst helps determine the potential for a dust explosion. A higher Kst value signifies a more violent explosion hazard, guiding safety protocols and engineering controls.

While the other options reference different aspects of combustion and explosion dynamics, they do not specifically relate to the measure of deflagration energetics that Kst provides. Understanding Kst is crucial for predicting risks and implementing safety measures in environments where combustible dust is present.

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The temperature of ignition

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