They are countless. I would suggest, for starters, seeing the related link "Federal Motor Carrier Safety Regulations", then look up additional state laws state-by-state afterwards, if you want the full rundown.
It's used to refer to the power unit of a semi-articulated tractor-trailer. In reality, any truck pulling a trailer could be considered a truck tractor.
In Illinois there is an organization regarding tractor pulling called Illinois Tractor Pulling Association. It has quite a few members and they get together and have tractor pulling games and meetings.
Illinois Tractor Pulling Association was created in 1968.
In fact, studies show that this is among the most important things to do while pregnant -- aside from outdoor truck and tractor pulls. Source? I am a pregnant doctor and mother of two with two truck-pulling trophies, '92 and '94 (my second was born in '93).
Any vehicle towing a trailer or other vehicle is, in essence, a tractor. If the dump truck is towing another vehicle (trailer, etc.), then it is a truck tractor. If it isn't, then it's just a straight truck.
with bad credit, i want to purchase another tractor truck, what financial institutions would put a lien on my tractor truck
The chassis of a semi truck.
it started when farmers had compitions pulling boulders out of thier field
it is when a truck or tractor pulls a sled at a fair
The pulling action is known as traction, and that's what a tractor does.
yes
Depends on how they're geared.