semi
Trailers vary in size.
tractor as well as trailor
if it is dyed diesel then no it is agents the law
Tractor trailor parts can be found at your local John Deere store. Other stores that carry tractor trailer parts include TSC (which is a feed store).
Some farm tractors have too much weight at the rear, so if a trailor is too heavy the tractor could tople over.
If you can't meet the requirements to obtain a DOT medical card, then no.
There is really no courses on learing to drive a tractor trailer, however you can get information online or maybe if you know someone who has a tractor trailor you can practice with theirs.
semi truck, or semi tractor trailer, and 18 wheeler.
18 for intrastate commerce, 21 for interstate commerce. That's a federal law.
semi cab
Big truck, semi, 18 wheeler.