The Correct 40 Point Response is:
1.
Unplug it using a long enough bar from a safe location outside of the
hopper.
2. If entry into the hopper is necessary, use a fall-arrest harness and
lanyard anchored such that you are unable to be covered by sliding
material in the event of a cave-in.
3. In cases requiring entry, you must also have an attendant similarly
equipped who can pull you out if a cave-in does occur.