Not just in NC, but in the whole of the United States, that vehicle would require a Class C CDL (minimum) with "P" (for 'Passenger') endorsement. Any vehicle of any weight class which is designed to transport more than 15 persons (including the driver) requires a CDL with P endorsement - Class C if under 26,000 GVWR, Class B if a single vehicle in excess of 26,000 GVWR.
If it's a school bus, you'll need the 'S' endorsement - essentially a passenger endorsement, but with a background check.
By the way, North Carolina will make you pay out the nose for a CDL - just wanted to make sure you knew that. The licence I paid $35 to transfer to Colorado last year cost me $220 when I renewed it in North Carolina in 2010. Mine is a Class A with two endorsements, so yours shouldn't cost as much, but it still won't be cheap.
Anyhow, go to the Drivers Licence Office (if you're in the vicinity of Garner/Clayton, I recommend the one on NC42 between US70 and I40 if you don't want to have to wait forever) and obtain a copy of the CDL handbook. You will need to take the following written tests:
You need to have a properly licenced driver bring the vehicle in with you when you take your written tests. The passenger endorsement requires a road test in the appropriate class of passenger vehicle - so you might as well get your CDL and passenger endorsement road tests knocked out in one sitting. You also need to schedule a physical exam for a DOT physical, as you will need the DOT medical card before you upgrade to a CDL.
Air brakes have absolutely ZERO determination in whether or not a vehicle requires a CDL.
No. Air brakes are not a parameter in determining whether or not a vehicle needs a CDL.
To answer you we need to know what country's traffic regulations you are asking about.
No, unless you're hauling something which requires a hazmat endorsement, such as contaminated soil.
Only if it's a vehicle equipped with air brakes.
The air brakes are irrelevant. And you'd need a medical card in that instance if you were doing interstate operations, but not intrastate operations.
Only if it's hauling hazmat or is a bus designed to transport more than 15 passengers (including the driver). Air brakes have absolutely nothing to do with whether or not a vehicle requires a CDL.
Only if it's a: transporting hazardous materials or b: a bus designed to transport more than 15 persons (including the driver).
Not unless it's a bus designed to transport more than 15 passengers (including the driver).
Only if it's transporting 16 or more persons (including the driver) or sufficient quantities of hazardous material to require placarding with HAZMAT warning signs.
No.
On a US drivers licence, there is no air brake endorsement - there is only an air brake restriction, and it is only applicable to CDL licences and commercial vehicles. Vehicles of 26,000 lbs. or less GVWR only require a CDL if they're hauling hazardous materials, or if they're designed to transport more than 15 persons (including the driver). Otherwise, most states will allow you to drive it on the same licence you use to drive any regular passenger car, without any requirement to be trained in the proper use of air brakes.