As with any interview question, you want to be prepared with an answer when this question is asked and not say you do not know what your greatest strength is. Avoid answering with multiple strengths, or ones that are not relevant to the position of an excavator operator. Your greatest strength might be public speaking in front of large groups of people, but that is not relevant to this position.

"My greatest strength is my ability to work well on diverse teams. I have been in this industry for ten years and have worked with people who speak different languages and come from different cultures. I am fascinated to learn from others when working in dynamic situations and circumstances, and enjoy being part of a team."