Crist CDL Training Center the home of free online practice tests





   Home Page
   Online Testing Center


   Knowledge Test 1
   Knowledge Test 2
   Knowledge Test 3
   Knowledge Test 4
   Knowledge Test 5
   Knowledge Test 6
   Knowledge Test 7
   Knowledge Test 8
   Knowledge Test 9
   Knowledge Test 10
   Knowledge Test 11


   Air Brakes Test 1
   Air Brakes Test 2
   Air Brakes Test 3
   Air Brakes Test 4
   Air Brakes Test 5
   Air Brakes Test 6


   Haz Mat Test 1
   Haz Mat Test 2
   Haz Mat Test 3
   Haz Mat Test 4
   Haz Mat Test 5
   Haz Mat Test 6
   Haz Mat Test 7


   Passenger Test 1
   Passenger Test 2
   Passenger Test 3
   Passenger Test 4
   Passenger Test 5
   Passenger Test 6


   Tanker Test 1
   Tanker Test 2
   Tanker Test 3
   Tanker Test 4
   Tanker Test 5


   Doub/Trips Test 1
   Doub/Trips Test 2
   Doub/Trips Test 3


   Combination Test 1
   Combination Test 2
   Combination Test 3



Air Brakes Test 4
To receive a copy of your score and the answer sheet, enter a Name and your e-mail address. Entering your e-mail address will enter you in our mailing list.

Name: (Optional)
E-mail: (Optional)


  1. Which of the following makes the total stopping distance for air brakes longer than that for hydraulic brakes.

a. Brake lag distance.

b. Action distance.

c. Perception distance.

d. Effective braking distance.

  1. Of the choices below, the first thing to do when a low air pressure warning comes on is:

a. Open the air supply control valve.

b. Adjust the brake pedal for more travel.

c. Stop and safely park as soon as possible.

d. Up-shift.

  1. The braking power of the spring brakes:

a. Can only be tested by highly trained brake service people.

b. Depends on the adjustment of the service brakes.

c. Increases when the service brakes are hot.

d. Is not affected by the condition of the service brakes.



  1. The air compressor governor controls:

a. When air is pumped into the air tanks.

b. Air pressure applied to the brakes.

c. The speed of the air compressor.

d. When the brake chambers release pressure.



  1. The application pressure gauge shows the driver how much pressure:

a. Has been used on the trip.

b. Is in the air tanks.

c. None of these.

d. Is being applied to the brakes.


Scroll down to Submit!





Copyright 2006 CristCDL.com LLC
All Rights Reserved

Site design by CristCDL.com Design Team