You can operate the crane - you just can't drive it down the road.
You can buy one, you just can't operate it.
Yes, you would. Without the trailer, you could operate it with either a Class A or Class B CDL.
Not sure what you mean, exactly. Class A is considered the "higher" classification, yes. If you have a Class A CDL, you can operate vehicles requiring that class of licence or any class below that. You could operate a vehicle requiring a Class B CDL, for example, but a driver with a Class B CDL wouldn't be permitted to operate a combination requiring a Class A CDL.
For private use, no state requires a CDL for an RV.
Not only any public roadway. This vehicle requires an active CDL, and if your DOT physical is expired, your CDL is null and void.
Yes you do need a CDL License to drive a bucket truck.
No. CDL requirements apply only to on-road vehicles.
No, CDL requirements pertain only to on-road vehicles.
You can have a CDL (Commercial Driver's License) without a Hazardous Materials Endorsement, but you have not have the HazMat Endorsement without a CDL.
They operate outside of their home state.
Depends on what the vehicle is.
Vehicles which are not used for on-road use do not require a CDL.