LA CDL AIR BRAKES PRACTICE TEST
View instructions
The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Louisiana CDL knowledge test. The LA CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Louisiana CDL Manual. Take this LA CDL practice test now to prepare for the actual air brakes test!
Not Sure You Will Pass?
Get a Pass Guarantee
Get a Pass Guarantee
UPGRADE TO CDL PREMIUM
1.
To check slack adjusters on S-cam brakes, you should:
use gloves and pull hard on each slack adjuster you can reach.
|
|
press the brake pedal and listen for any strange noises.
|
|
check that the spring brakes come on automatically.
|
|
All of the above.
|
2.
The safety valve installed in the first tank the air compressor pumps air is set to open:
every 15 minutes.
|
|
if there is too much pressure.
|
|
if there is too little pressure.
|
|
at 30 psi.
|
3.
When should you be particularly careful about high winds?
When driving in winter
|
|
When going downhill
|
|
When driving at night
|
|
When emerging from a tunnel
|
4.
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, you will only receive a CDL permit.
|
|
If you don't pass the air brakes test, you will be restricted to driving vehicles without air brakes.
|
5.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
The steering feels heavy.
|
|
The brake pedal feels spongy or goes to the floor.
|
|
You have to apply your brakes harder and harder to get the same stopping power.
|
|
You hear a loud "bang".
|
6.
Foundation brakes are used:
at each wheel.
|
|
only with the rear wheels.
|
|
only with the front wheels.
|
|
only with the right wheels.
|
7.
The safety relief valve is located:
in the first tank the air compressor pumps air to.
|
|
on the dashboard.
|
|
on each end of the vehicle's axles.
|
|
in the front brake.
|
8.
The safety valve is usually set to open at:
150 psi
|
|
125 psi
|
|
100 psi
|
|
200 psi
|
9.
Air tanks must be drained because:
if one air system is low on pressure, the rear brakes will not be operating fully.
|
|
when you push the brake pedal, air is let into each brake chamber.
|
|
if you don't drain the tanks yourself, your battery fluid may drain out.
|
|
compressed air usually has some water in it. The water can freeze in cold
weather and cause brake failure.
|
10.
With brake drums, if brakes become too hot:
the air compressor will kick on to cool the brakes.
|
|
your ABS will malfunction.
|
|
the brakes may stop working.
|
|
the brakes will supply too much power to the drive wheels.
|
Page 1 of 3
Next page
Grade this page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More
LA CDL Air Brakes Test
Number of questions: | 25 |
Correct answers to pass: | 20 |
Passing score: | 80% |
Save Time. Learn Faster.
Ace Your CDL Test.
Ace Your CDL Test.
UPGRADE TO CDL PREMIUM
Rate this CDL Air Brakes Test
4.8 out of 5
based on 207 votes
based on 207 votes