What to wear on an interview for an industrial job?

My brother has a job interview next week. The job is as a lead worker maintaining industrial machines. What would be good to wear for the interview? Would jeans be too casual? Should he wear khakis? Also, he despises polo shirts but I think a T-shirt would be too casual. Any suggestions?|||Even if it%26#039;s an industrial job, applicants should always dress up for interviews. He probably won%26#039;t be wearing a dress shirt and khakis on the job, but he%26#039;ll only score points for looking professional. Jeans and a T-shirt are too casual for a job interview, so go for a button-down, khakis and nice shoes (no sneakers or flip-flops).|||Dress nicer for the interview than you would ordinarily expect to dress on the job.|||suck it up and wear a polo...jeans and tshirt, big no no...polo and khakis should be good.|||http://knowinterview.blogspot.com/2008/0...