can a driver with a class b cdl legally drove a tractor with no trailer?

Class B CDL and Class A CDL are weight specific, so no.

 

Yes, class b can drive a bobtail tractor

 

As long as you have a B with air brakes, yes.

 

i am actually trying to look that up, so i may have to step back and say yes, bob tailed only. as i see it, 26,001 pounds is for both, it is indeed the trailer that makes the difference.

 

Its like nothing over 26,000 lbs for class B license


^###### beat me to it

 

If a commercial truck has a gross vehicle weight of 26,001 pounds or greater, you are required to have a Class "B" license to operate it. You can pull any trailer up to and including 10,000 pounds regardless of the configuration of that trailer (ball mount, goose-neck, etc.).

If that trailer is heavier than 10,000 pounds, then you are required to have a Class "A" license.

 

From the fmcsa website:
"Class B: Any single vehicle which has a gross vehicle weight rating or gross vehicle weight of 11,794 or more kilograms (26,001 pounds or more), or any such vehicle towing a vehicle with a gross vehicle weight rating or gross vehicle weight that does not exceed 4,536 kilograms (10,000 pounds). - See more at: https://www.fmcsa.dot.gov/registration/commercial-drivers-license/drivers#sthash.OPLeQnoj.dpuf"