Which of the following is a common ignition source at hazmat scenes?

• A. Pagers
• B. Hand lights
• C. Lighting equipment
• D. Radios

Answer: (C)

Ignition sources at hazMat scenes are anything that can produce heat, sparks, or an electrical arc in the presence of flammable vapors or dust. Lighting equipment fits this risk pattern because electrical lights can overheat, arc, or fail in a way that ignites vapors if they’re not explosion-proof or properly rated for hazardous locations. That’s why the use of intrinsically safe or explosion-proof lighting is emphasized in hazmat response to minimize this risk.

Pagers and radios don’t typically ignite vapors; they transmit RF energy, which is not a common ignition mechanism for hazmat environments. Hand lights are also electrical devices, but the general hazard emphasis is on lighting equipment as a class, since it encompasses the kinds of fixtures and power sources that are most likely to create an ignition in the field.