As for endorsements exclusive to a CDL, you can get hazmat, passenger, and tanker endorsements. You can also get a motorcycle endorsement, which can be placed on any class of licence.
The only endorsement you wouldn't be able to get is the endorsement for double and triple trailers.
Class C CDL with School Bus endorsement.
Restrictions include: B - corrective lenses required D - Anatomical Donor M- Restricted to Class B and Class C Passenger vehicles (This restriction goes with a P - passenger endorsement on a class A CDL) N- Restricted to class C Passenger vehicles (This restriction goes with a P - passenger endorsement on a class A CDL)
You may only have one license. If you have a Class A CDL, you can operate a vehicle requiring a Class B or Class C CDL, so long as you have any endorsements necessary for the vehicle type (e.g., tank endorsement for tank vehicles, passenger endorsement for passenger vehicles, hazmat endorsement for vehicles hauling hazardous materials, etc.).
Class C CDL with School Bus endorsement.
Depends on the GVW of the vehicle. If it's under 26,000 lbs. GVW, it requires a Class C CDL with passenger endorsement. If it's over 26,000 lbs. GVW, it requires a Class B with passenger endorsement.
Yes. The vehicle would require a Class C CDL with the Passenger endorsement.
Yes, but you'll receive a restriction appropriate to the class of vehicle you road test in for your passenger endorsement (e.g., if you road test in an 18k GVW passenger bus, you'll be restricted to buses requiring a Class C CDL, if you road test in a 26,001 - 33,000k bus, you'll be restricted to buses requiring a Class B or C CDL).
All you have to do to get the endorsement is pass the written test and road test in a passenger vehicle. However, if you have a Class A CDL and road test in a vehicle requiring only a Class C CDL, you'll be restricted to operating passenger vehicles in that class and lower.
You will need a Class B CDL with tanker endorsement.
Yes, it would be for either S or P endorsement.
If it has a Gross Vehicle Weight Rating of 26,000 lbs. or less, a Class C CDL. If it has a Gross Vehicle Weight Rating of more than 26,000 lbs., Class B CDL. In both cases, a passenger endorsement is required.
There is no "school bus CDL". You either have a Class C or Class B CDL with a school bus endorsement. A Class C, you can drive any bus under 26,001 lbs. GVWR. If you get a hazmat endorsement, you can transport hazardous materials in any vehicle 26,000 lbs. GVWR or less. If you have a Class B, technically, you can drive any single vehicle with a Gross Vehicle Weight Rating of more than 26,000 lbs, but you're not going to get hired to drive a Class 8 with an unsynchronized manual transmission without any experience.