DC CDL AIR BRAKES PRACTICE TEST
6.
Excessive use of the service brakes results in overheating. Too much heat can:
|
cause the brakes apply unevenly.
|
|
|
make the brakes stop working.
|
|
|
cause the brakes to squeak.
|
|
|
cause the brakes to grab.
|
7.
To check the slack adjusters on S-cam brakes, you should:
|
park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
|
|
|
park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
|
|
|
release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
|
|
|
All of the above.
|
8.
Do NOT use the parking brakes:
|
if the brakes are very hot.
|
|
|
when you park for less than two hours.
|
|
|
when you leave your vehicle.
|
|
|
to test that they work.
|
9.
In air-operated disc brakes, the pressure of the ______ on the ______ turns a "power screw".
|
slack adjuster; cam roller
|
|
|
brake camshaft; tie rod
|
|
|
brake chamber; slack adjuster
|
|
|
slack adjuster; tie rod
|
10.
The __________ keeps air from going out if the air compressor develops a leak.
|
tractor protection valve
|
|
|
emergency relay valve
|
|
|
air compressor drive belt
|
|
|
one-way check valve
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More