Final answer:
A lug nut on a wheel is typically removed using a socket wrench or a power drill with a socket attachment, turned counterclockwise. For very tight bolts, mechanics may use a pipe over the wrench handle to increase leverage, but this method carries the risk of breaking the bolt.
Step-by-step explanation:
The tool commonly used to remove lug nuts from the wheel of an automobile is a wrench. In particular, a socket wrench or a power drill with a socket attachment is ideal for this task. The action to remove a lug nut involves positioning the socket onto the nut and turning the handle counterclockwise to loosen it. If a lug nut is particularly tight, mechanics may increase the leverage by placing a length of pipe over the handle of the wrench, although this can be risky as too much force might break the bolt.
One should always ensure to use the correct size socket to avoid stripping the nut. Additionally, to ensure safety and to minimize the risk of injury or damage to components, one should follow proper procedures for lifting and supporting the vehicle when removing lug nuts.