⟩ What are your greatest strengths as Plant Manager?
They are asking you this in a broad sense. So ask yourself: What are you best at doing?
Are you a good leader?
Are you a skilled time manager?
Are you a great communicator?
Are you a detailed planner?
Are you good at convincing others?
Whatever you are best at doing, give the interviewer the top 2 or 3 things you excel at.