In Partnership with Chattanooga Public Library
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 Tennessee CDL knowledge test. The TN 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 Tennessee CDL Manual. Take this TN CDL practice test now to prepare for the actual air brakes test!
1.
If your brakes fail while you are driving on a downgrade, you should:
|
take the least hazardous escape route you can.
|
|
|
immediately start looking outside your vehicle for something to stop it.
|
|
|
use an escape ramp if it's available.
|
|
|
All of the above.
|
2.
With a dual air brake system:
|
one system is the main braking system while the other is a back-up system.
|
|
|
each system shares the same lines and hoses.
|
|
|
each system has its own air tanks, hoses and lines.
|
|
|
each system shares air tanks.
|
3.
When the air pressure is built up to governor cutoff, the air leakage rate for combination vehicles with the engine off and the foot brake fully applied should be less than_____ in one minute.
|
4 psi
|
|
|
5 psi
|
|
|
3 psi
|
|
|
2 psi
|
4.
If the low pressure warning signal doesn't work:
|
this could cause sudden emergency braking in a single-circuit air system.
|
|
|
you could lose air pressure and you would know it.
|
|
|
in dual systems the stopping distance will be decreased.
|
|
|
None of the above.
|
5.
ABS helps you:
|
increase your normal braking capability.
|
|
|
avoid wheel lock up and maintain control of your vehicle when you brake.
|
|
|
steer gently and smoothly while you are braking.
|
|
|
stop much faster.
|
Next page