Failing to decrease the feed pressure on a drill as its point begins to break through the bottom of the work piece will cause the drill to __________.

Correct Answer: Option D — jam in the work piece and tend to whirl it around

As a drill breaks through the bottom of a workpiece, the cutting edges experience a sudden reduction in resistance. Failing to reduce feed pressure causes the drill to 'grab' the metal, potentially causing the drill to jam, break, or violently rotate the workpiece, creating a significant safety hazard.