Safest driving speed are
Statistically, air travel is the safest.
While driving, the air sup... raises the vehicle up a couple of inches. This is not noticeable while driving but if you stand by (or lean on) the vehicle after parking, you will notice it dropping slowly. Sometimes you can even hear it when it starts to drop. I assume the air sup... makes for a smoother ride......like riding on air.
no
In your toilet
King air
For driving an air brake equipped vehicle, or for working on them? To work on them, you have to get the ASE certification. You must take and complete that ASE test to become certified. To drive a vehicle equipped with them, assuming you're in the US, there is no such license. If you have a CDL, then you must complete and pass the written test and do your road test in an air brake equipped vehicle, or else you get a restriction which prohibits you from operating a commercial vehicle equipped with air brakes.
Aircraft quality AN fittings are the safest form of hose clamps you can use on any automobile.
Yes if the air bag has an on/off switch. But if this is a car with a back seat and not a vehicle with no back seat, place the child in the rear. This is the safest place for a child.
Air travel is really the safest mode of transportation. Pilots are highly trained professionals and must log many hours before they are allowed to pilot a plane full of passengers. Autos are safe but it is the people who are driving them that make them dangerous. Air travel is highly regulated in how, where, when planes can fly. Air traffic controllers guide planes through air space so it is safe. There are relatively few accidents in the millions of miles that planes fly.
Not for a Class C, unless you need to road test on a vehicle with air brakes.
There is no air brake endorsement. A CDL driver who does not complete and pass the written air brakes test AND complete and pass the road test in a vehicle equipped with air brakes gets a restriction prohibiting them from operating a commercial vehicle equipped with air brakes.