OSHA 10-Hour Construction ReviewTools - Hand and PowerMedium
A worker is using a powder-actuated tool to fasten a wooden plate to a steel beam. Which of the following is an unacceptable condition for using a powder-actuated tool?
- AThe tool is used in an area where flammable gases are present.
- BThe tool is equipped with a guard that deflects particles away from the operator.
- CThe fastener is driven into a material that is softer than the fastener.
- DThe worker is wearing appropriate personal protective equipment (PPE).
Show answer & explanationAnswer & explanation
Correct answer: A. The tool is used in an area where flammable gases are present.
Powder-actuated tools use a small explosive charge to drive fasteners. Using them in the presence of flammable gases creates a significant risk of fire or explosion.
Why the other options are wrong
- B. A guard is a safety feature designed to protect the operator, making it an acceptable condition.
- C. Driving a fastener into a softer material is generally acceptable, provided the material can hold the fastener.
- D. Wearing PPE is a required safety measure, not an unacceptable condition.
Powder-Actuated Tool Prohibited Uses
Powder-actuated tools must not be used in environments where their operation could ignite flammable substances or create unsafe conditions due to material type.
- Avoid flammable/explosive atmospheres.
- Do not drive fasteners into unsuitable materials (e.g., cast iron, too thin steel).
- Always use appropriate PPE.
Memory trick: No bang near gas, or a blast you'll get fast.