Apply the brakes as hard as possible without locking the wheels.


Apply the brakes with about half of your usual force.


Apply the brakes so the wheels lock.


Apply the brakes with minimal pressure.

Number of questions:  25 
Passing score:  20 
Apply the brakes as hard as possible without locking the wheels.


Apply the brakes with about half of your usual force.


Apply the brakes so the wheels lock.


Apply the brakes with minimal pressure.

Is not recommended on vehicles with air brakes.


Is required on vehicles with air brakes.


Is optional on vehicles with air brakes.

Compressed air


Liquid nitrogen


Carbon dioxide

5 mph


10 mph


15 mph


20 mph

Stop where you are and park


Exit the roadway as soon as safely possible


Continue driving normally

3 psi in one minute.


6 psi in one minute.


8 psi in one minute.

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