The hazard described by the term 'static electricity' in the context of explosive safety is best defined as which?

• A. Uncontrolled electrical discharge
• B. Chemical corrosion
• C. Thermal burn risk
• D. Acoustic shock

Answer: (A)

Static electricity in explosive safety is about the buildup of electrical charges on surfaces and the sudden, uncontrolled discharge that follows. This discharge manifests as a spark, which can provide the energy needed to ignite sensitive energetic materials. That spark is the core hazard, which is why uncontrolled electrical discharge is the best description. The other ideas don’t fit: chemical corrosion is a slow chemical process, not an ignition event from a spark; a thermal burn risk can result from a spark but the defining hazard is the spark itself, not just heat; acoustic shock has no relation to electrical charge buildup or sparks.