Pre-Employment tests

Q. Our company operates a distribution warehouse. Our application process used to be very simple—applicants would come into the warehouse and voice their interest. We would do a quick interview on the spot and usually hire the person. Since then our company has grown significantly and we want to make sure we are in compliance with current regulations. In order to work in the warehouse, employees must be able to lift at least 75 pounds. During an interview, can we ask what disabilities, if any, an applicant may have? We just want to make sure our employees are able to lift the boxes. ...