Yes, so long as two points of criteria are met - 1: you must have a passenger endorsement (P) on your CDL for any vehicle designed to transport more than 15 persons (including the driver) on any public roadway or property; 2: you must not have an "L" (no air brakes) restriction, meaning you need to have completed the written air brakes CDL test and performed your road test in a vehicle equipped with air brakes.
Only if they have a passenger endorsement and do not have a "no air brakes" restriction.
Whether a vehicle has air, hydraulic, or air-over-hydraulic brakes has zero determination on the class of license required to operate it.
Yes
Class 1
Class C. Since the vehicle weighs less than 26,001 pounds you don't need a Class B CDL, but you can't put an air brake endorsement on a non-commercial driver's license so Class C it is. Make sure you bring a vehicle with air brakes to your road test; if you don't you'll receive a "no air brakes" limitation on your license. However, since a trolley is a rail vehicle, and not a road vehicle, it's likely you won't need a CDL for it, but will have to undergo company training to operate it.
To drive a semi truck, you need a specific driving license that allows you to drive that class of vehicle. As well, as proper education and training such as driver's ed.
You can get a Class A CDL without air brakes - you'll just have a "no air brakes" restriction which prohibits you from operating a CMV equipped with air brakes. The vehicles you road test have to be commercial vehicles subject to FHWA regulations - recreational vehicles are exempt, so you cannot get a CDL with one.
No. Air brakes are not a parameter in determining whether or not a vehicle needs a CDL.
In the US, the type of brake system has no role in determining what class of license is required to operate a vehicle.
Yes. You can drive that vehicle with either a Class B or Class A CDL.
No. Air brakes don't determine whether or not a CDL is required for a vehicle, and CDLs are for road vehicles - a trolley is a rail vehicle.
Whether a vehicle has air or hydraulic brakes has no impact on what kind of license is required to operate it in the US.
read your cdl manual and study for air brakes, General knowledge, passenger.for written test. For class BPYou also need to take your road test in a vehicle equipped with air brakes. By the way, there is no air brake endorsement - if you don't complete the requirements for air brakes, you get an air brake restriction.