Yes, you will need insurance to drive with a CDL license.
It depends on the model. You need a CDL to drive one that bends in the middle or is over a certain length
If the vehicle requires a CDL in service, it'll require a CDL for the test drive.
Yes you do need a CDL License to drive a bucket truck.
No
no
No
No, just to drive it.
If it's a truck which anyone else would be required to have a CDL to drive, then yes.
CDL... Commercial driver license.. Think about it.
No... to drive a bus unsupervised, you need an unrestricted, full-on CDL license, with a passenger endorsement. You may not legally operate a bus - loaded or empty - otherwise.
Anything defined as a CMV will require a CDL, regardless. So if it's pulling a trailer, yes, it will require a CDL.