Why is it important to unplug tools before maintenance?

Why is it important to unplug tools before maintenance?

• A. To prevent battery discharge
• B. To avoid electrical noise
• C. To prevent accidental start-up and injury
• D. To save energy

Answer: (C)

When you’re working on a tool, the main concern is preventing the tool from starting and causing injury. Unplugging removes the electrical energy path, so even if a switch is bumped or a cord is snagged, the motor can’t turn on and the moving parts won’t suddenly engage. For cordless tools, removing the battery serves the same purpose, since it eliminates stored power that could start the tool. The other options don’t address that immediate safety risk. Electrical noise isn’t a safety issue in this context, saving energy isn’t the priority during hands-on maintenance, and while battery life matters for cordless tools, it’s not the reason we unplug before servicing.

When you’re working on a tool, the main concern is preventing the tool from starting and causing injury. Unplugging removes the electrical energy path, so even if a switch is bumped or a cord is snagged, the motor can’t turn on and the moving parts won’t suddenly engage. For cordless tools, removing the battery serves the same purpose, since it eliminates stored power that could start the tool.

The other options don’t address that immediate safety risk. Electrical noise isn’t a safety issue in this context, saving energy isn’t the priority during hands-on maintenance, and while battery life matters for cordless tools, it’s not the reason we unplug before servicing.