Which hazard category includes electrically initiated devices?

• A. Electrical
• B. Pneumatic
• C. Hydraulic
• D. Thermal

Answer: (A)

Hazard categories are organized by what initiates the device. Electrically initiated devices rely on electrical energy to start a detonation or action, so they belong in the Electrical category. The other options refer to different triggering methods: pneumatic uses compressed air, hydraulic uses fluid pressure, and thermal uses heat. Knowing this helps you classify a device by its initiating energy and anticipate the appropriate safety controls for electrical initiations, such as avoiding sparks, proper insulation, and safe electrical handling.