CDL Air Brakes Test (2024) - FREE Maine CDL Practice Test

1. With the controlled braking method, you:

apply the brakes as hard as you can without locking the wheels.
apply the brakes all the way and release brakes when the wheels the lock up.
push down on the brake pedal as hard as you can so that the wheels the lock up.

2. When confronted by an aggressive driver, you should:

call the police, if you have a cell phone and can do it safely.
avoid eye contact.
All of the above.

3. To operate a vehicle equipped with air brakes, you must pass the air brakes knowledge test. Why?

If you don't pass the air brakes test, you can't get a CDL.
All trucks have air brakes.
If you don't pass the air brakes test, you will be restricted to driving vehicles without air brakes.

4. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line causes:

the trailer spring brakes to come on.
the speed of your vehicle to increase.
the trailer emergency brakes to come on.

5. Do NOT use the parking brakes:

if the brakes are very hot.
when you leave your vehicle.
when you park for less than two hours.

6. If your truck has automatic transmission, you should downshift:

whenever road conditions allow.
when going down grades.
after entering a curve.

7. If are being followed closely, you should:

increase your following distance.
decrease your following distance.
change lanes quickly.

8. To prevent rollover, you should:

place the cargo near the rear of the trailer.
put the lightest parts of the cargo under the heaviest parts.
keep the cargo as close to the ground as possible.

9. You supply air to the trailer brake system by:

connecting the tractor service air line to the trailer service glad hand.
pushing in the trailer air supply knob.
plugging the electrical cord into the trailer.

10. Weight that is loaded so there is a high center of gravity:

reduces the chance that the load will shift to the side or fall off.
makes a vehicle easier to handle.
causes greater chance of rollover.

MAINE CDL AIR BRAKES PRACTICE TEST