In which Class Division may combustible dust be present due to abnormal operations?

The correct choice is Class 2 Division 2, which pertains to locations where combustible dust can accumulate and may be present under abnormal conditions, such as equipment failure or maintenance activities. This classification indicates that while dust is not typically present during normal operations, it can be generated or become airborne during specific circumstances.

Class 2 environments specifically deal with combustible dusts, which can create ignition hazards. Division 2 indicates that the presence of dust is not constant and may only occur in unusual situations, unlike Division 1 where the hazardous conditions are more frequent or continuous.

Understanding the distinctions among these classifications is critical for proper risk assessment and ensuring that appropriate safety measures and fire protection systems are in place to mitigate the potential hazards associated with combustible dust.