<p>Duke looks like it only has Mechanical, EE, Biomedical and Civil? Unless you are sure one of those interests you I'd look elsewhere. You'd be missing out on chances to major in Operations Research/Industrial Engineering, Chemical Engineering, Environmental Engineering, Materials Science and Engineering, and "hybrid" fields like Computer Engineering or Engineering Physics. If you don't know what you want to major in it doesn't make sense to limit yourself like so.</p>