Air Brakes CDL Test - FREE Georgia CDL Practice Test

1. A passive railroad crossing is one that:

has a traffic control device installed at the crossing to regulate traffic.
requires you to stop and wait until the traffic control device installed at the crossing tells you to proceed.
has at least two traffic control devices installed at the crossing to regulate traffic.
does not have any type of traffic control device.

2. To check the slack adjusters on S-cam brakes, you should:

park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
All of the above.

3. What factors can cause brakes to fade or fail?

Not taking your foot off the accelerator.
Going too slow.
Not pressing the brake pedal hard enough.
Overheating, low air pressure or water in the air tanks.

4. Antifreeze:

helps the engine under hot conditions as well as cold conditions.
helps the engine only when the temperature is below freezing.
helps the engine only under hot conditions.
doesn't help the engine in any way.

5. Emergency brakes are:

not required on commercial vehicles with air brakes.
not required on buses.
required on all vehicles.
not required on doubles.

6. Which of the following statements is true?

There is no way that short circuits due to damaged insulation can cause a vehicle fire.
Poor cargo ventilation is a common cause of fire.
Under-inflated tires will NOT cause a vehicle fire.
Carrying a properly charged and rated fire extinguisher will help prevent fires.

7. The low pressure warning signal will generally activate when the air pressure falls between:

8. To apply the parking brakes:

push the brake pedal three times.
place the parking brake control knob in Neutral.
pull the parking brake control knob out.
push the parking brake control knob in.

9. The total stopping distance for vehicles with air brake systems is made up of __ different factors.

10. Why must air tanks be drained?

The water can freeze in cold weather and cause brake failure.
Your transmission fluid may drain out.
There might not be enough antifreeze in the system.
The alcohol evaporator might stop working.

GA CDL AIR BRAKES PRACTICE TEST