Crist CDL Training Center the home of free online practice tests

  Home Page
  New Online Learning Center
  Outdated Testing Center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 1
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. Modern air brake systems combines three different systems. The are the service brakes, the parking brakes and the:

a. S-cam brakes.

b. Drum brakes.

c. Foot brakes.

d. Emergency brakes.

  1. Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks?

a. After every working day.

b. After every four hours of service.

c. Once a week.

d. Every other week.

  1. Why drain water from the compressed air tanks?

a. To keep from fouling the air compressor oil.

b. Water can freeze in cold weather and cause brake failure.

c. The low boiling point of water reduces braking power.

d. Water over cools the compressor.

  1. Air brake equipped vehicles must have:

a. A supply pressure gauge.

b. An air use gauge.

c. At least two brake heaters.

d. A backup hydraulic system.

  1. What can legally hold a parking or emergency brake in position for a truck, truck tractor or bus?

a. Fluid pressure

b. Air pressure

c. Spring pressure

d. Any of the above

Scroll down to Submit!

Copyright 2006 LLC
All Rights Reserved

Site design by Design Team