mr electron wrote:

I have applied to a machine shop looking for apprentices. This week I
will have in interview and was wondering the typical attire for this
type of interview. I've always been taught to dress neatly in the
typical attire of the employees working there. Shop attire there is
typically jeans and a t-shirt.

I have no time to purchase any clothing due to my schedule. Would
wearing a pair of work pants and a dark t-shirt be okay? That would be
typical attire of the employees there. The only other option I have is
a 3-piece suit, which I believe would be out of the question for this
type of job.

Sounds like you don't really have a choice.
Between the two, I'd pick the work pants and
t-shirt. Make sure they are spotless and
nicely pressed.