If it does not require a CDL to be driven, there are no additional requirements. Such an endorsement does not exist on US licenses.
That depends on which country you live in.
As much as their company is willing to pay them. You could have a Class B CDL and drive a trash truck, dump truck, roll off truck, oilfield truck, or have a job where driving isn't even the primary line of work. By the way, there is no such thing as an air brake endorsement on a US license - only a restriction for CDL drivers if they don't pass the written air brakes test and perform their pretrip and road tests in a vehicle equipped with air brakes.
On a US licence, there is no air brake endorsement - there is only a restriction for CDL drivers from operating a commercial vehicle equipped with air brakes if they don't complete the written test AND road test in a vehicle equipped with air brakes.
If you're in the US, there is no such thing as an air brake endorsement. CDL drivers receive a restriction which prohibits them from operating a commercial motor vehicle equipped with air brakes if they do not pass both the written air brakes test and do their road test in a vehicle equipped with air brakes.
On a US licence, the supposed "air brake endorsement" does not exist. For a driver obtaining a CDL, they must take the written air brakes test, and conduct their road test in a vehicle equipped with air brakes, or else they will get a restriction prohibiting them from operating a commercial vehicle which is so equipped. For everyone else, no such criteria exists - RVers, people renting U-Haul/Ryder trucks, etc. do not need to know the first thing about air brakes in order to be allowed to operate a vehicle equipped with them, so long as that vehicle doesn't require a CDL.
Yes
If the truck and trailer are not equiped with air brakes. If the truck and trailer are not comercial vehicals.
There is no such thing as an air brake endorsement on a US license - only a restriction for CDL holders who do not pass the written air brakes test and perform their pretrip and road tests in a CMV which is equipped with air brakes.
Air brakes have absolutely NO effect on whether a vehicle requires a CDL or not.
In the US, no - there is no such thing as an air brake endorsement - only a restriction for CDL holders who don't pass the written air brakes test and complete the pretrip and road tests in a vehicle equipped with air brakes, which prohibits them from operating vehicles requiring a CDL which are equipped with air brakes.
Depends on your country. If you have an air brake endorsement, then you're not in the US, as there is no such thing here. Other countries require it. Your licensing requirements for operating that vehicle will also depend on the Gross Vehicle Weight Rating.
There is no such thing as an air brake endorsement on any US license, CDL or otherwise. Only a restriction for CDL holders if they don't complete the written air brakes test and perform their pretrip and road tests in a CMV equipped with air brakes, which prohibits them from operating a vehicle requiring a CDL which is equipped with air brakes.