Final answer:
To set a depth-stop, tools and machinery may use screws, levers, or springs for precise control. Each mechanism plays a role in ensuring consistent and precise measurements when performing tasks that require a controlled depth.
Step-by-step explanation:
When it comes to setting a depth-stop on a tool or machine, the common mechanisms include screws, levers, and sometimes springs, depending on the specific design of the tool. The depth-stop is a critical feature as it allows the user to control the depth of drill or cut to ensure consistency and precision in their work.
For example, on a drill press, a screw can be used to set the depth-stop by restricting how far the drill bit can descend. By adjusting the position of the screw, you effectively set the limit of travel for the drill. A lever may also be used, often in conjunction with a screw, to lock or unlock the position of the depth-stop. Springs are less common for setting a depth-stop but may be used to provide tension or resistance in a depth-setting mechanism. The correct answer to which of these can be used to set a depth-stop is therefore not 'None of the above' but all of the options listed: screw, lever, and spring.