Question

before replacing parts such as bits, blades, or discs on any tool, you must ______.
options:

• polish it with a fine steel wool
• recharge the tool’s battery
• disconnect the power source
• inspect them for cracks

Explanation:

When replacing parts of a tool (like bits, blades, discs), safety is crucial. Disconnecting the power source (e.g., unplugging, turning off power) prevents accidental startup and injury. Polishing, recharging the battery, or inspecting for cracks aren't the necessary first step before part replacement.

Answer:

C. disconnect the power source