Which statement explains why power tools should not be used around flammable vapors?

• A. They create hazardous noise
• B. They can ignite flammable gases or vapors due to sparks
• C. They can vibrate components loose
• D. They produce excessive heat

Answer: (C)

Ignition sources must be controlled around flammable vapors, and power tools are a common source of ignition because they can produce sparks during operation. Sparks can come from electrical contacts, switches, or grinding and metal-to-metal friction, and they can easily ignite vapors even at low concentrations. Heat from a tool can also pose a risk, but sparks are the most immediate and consistent threat in this scenario. Noise or vibration isn’t typically an ignition mechanism, and while excessive heat matters, the spark hazard is the primary reason to avoid using power tools near flammable vapors. Use intrinsically safe or spark-free tools and ensure vapors are cleared or properly ventilated before work.