Final answer:
To create a rabbet with a router, adjust the depth of the router according to the size of the rabbet you need: shallow for a small rabbet, deep for a large one, or medium for an average size. Routers are appropriate tools for creating rabbets.
Step-by-step explanation:
If you need to create a rabbet on a board using a router with a straight bit, it is important to consider the size of the rabbet you want to make. This will determine the depth setting for your router.
1) If you want to create a small rabbet, you would indeed set the router to a shallow depth.
2) To create a large rabbet, you would need to set the router to a deeper depth.
3) For a medium-sized rabbet, you would set the router to a medium depth.
4) Lastly, the statement that a router should not be used to create a rabbet is incorrect; routers are commonly used to create rabbets in woodworking.
Therefore, the correct approach depends on the size of the rabbet you are trying to achieve. By adjusting the depth of the cut with your router, you can tailor the size of the rabbet to your specific needs.