Step 1 : Introduction to the question "2. Now on to the walls. What tool would you use to make sure the walls are perpendicular to the ground?"
...1. plumb bob 2. hammer 3. chalk line 4. auger bit A plumb bob is a string with a pointed weight at the end. This is one of the oldest hand tools. Most builders don't use a plumb bob anymore as there are specialized levels that do the job.
