Final answer:
The highest power level for a powder-actuated device is 4, used for fastening materials in construction and manufacturing safely and securely.
Step-by-step explanation:
The highest power level for a powder-actuated device is 4. Powder-actuated tools are used in construction and manufacturing to join materials together. They use a small, controlled explosion to drive a fastener into a solid base material. The power levels of these devices are measured in levels, typically ranging from 1 to 4. The power level needed depends on the strength of the base material and the length of the fastener being used. It's important to choose the right power level to ensure a secure fastening without causing damage to the material or posing a safety risk to the operator.