While work on the cargo operations team at Air New Zealand doesn't require operating machines that a Heavy Equipment Operator would, the job still entails work on several types of machines. While your interviewer will be able to tell a lot about your work history from your resume/application, they want to hear firsthand from you any experience that you do have. If you don't have experience working on tractors, front-end loaders, or other large equipment, try to relate to other large or heavy pieces of equipment in your personal or work history. These can include forklifts, large industrial trucks, or other pieces you see fit. As you answer, make sure you discuss your ability to train on any equipment that you work with and the confidence you have in doing so.