Final answer:
Powder-actuated tools should not be used on materials that are too hard, like rock, as they can cause shattering, or on materials that are too soft, like wood, due to potential splintering. They are designed for specific applications such as joining materials to concrete or steel following safety guidelines and manufacturer instructions.
Step-by-step explanation:
The question relates to the safety and suitable applications of powder activated tools, also known as powder-actuated tools. These tools are a type of nail gun used in construction and manufacturing to join materials to hard substrates such as steel and concrete. However, powder activated tools should not be used on materials that are too hard or brittle, like rock, because the driving force can shatter the material, or on materials that are too soft, like wood, because the tool is overpowered for such a material and can cause splintering or loss of holding power.
In practice, safe use of powder-actuated tools includes following proper procedures and safety guidelines, such as wearing protective equipment, checking for hazards in the work area, and using the correct charges and fasteners for the material being joined. One should always refer to the tool's manufacturer guidelines and occupational safety standards when determining the appropriate usage of these tools.