3 Questions
True or false: The coefficient of explosivity (Kex) is only related to the concentration of coal dust in the air.
False
True or false: Coal dust with low volatile matter content is more explosive than high volatile matter content.
False
True or false: Coal dust explosions can only be prevented through proper ventilation and dust control measures.
False
Study Notes
- Explosivity of coal dust depends on particle size, concentration, composition, incombustible dust and gases, and ignition temperature.
- Smaller particle sizes have higher surface areas and are easily ignited when airborne.
- A concentration of 30-2000 g/m3 can cause an explosion, with 112-350 g/m3 giving the maximum effect.
- Coal dust with high volatile matter content is more explosive than low volatile matter content.
- Coefficient of Explosivity (Kex) is related to Volatile Matter (VM) content of coal: Kex = 4.2VM + 3.
- Presence of incombustible dust and gases affects explosivity.
- Ignition temperature is also a factor in explosivity.
- Coal dust explosions can be prevented through proper ventilation and dust control measures.
- Coal mining and handling industries are at risk of coal dust explosions.
- Proper safety measures and training are necessary to prevent coal dust explosions.
Test your knowledge on the explosivity of coal dust with this informative quiz. Learn about the factors that contribute to coal dust explosions, such as particle size, concentration, composition, and ignition temperature. Discover the importance of Coefficient of Explosivity (Kex) and how it relates to volatile matter content. Understand how proper ventilation and dust control measures can prevent coal dust explosions and why the coal mining and handling industries are at risk. Take this quiz to enhance your understanding of coal dust explosivity and the
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