WY CDL AIR BRAKES PRACTICE TEST
21.
When the low air pressure warning light and buzzer first come on, you should:
|
immediately put alcohol into the air system.
|
|
|
speed up to restore pressure.
|
|
|
downshift and slow down.
|
|
|
bring the vehicle to a safe stop right away.
|
22.
The one-way check valve:
|
supplies air to the trailer air tanks.
|
|
|
keeps the axles in place.
|
|
|
keeps air from going out if the air compressor develops a leak.
|
|
|
keeps your wheels from locking up when you brake hard.
|
23.
If your ABS fails:
|
you will have no brake function, and could lose control.
|
|
|
the first step is to get the vehicle off the road and stop.
|
|
|
your tires might grab unexpectedly and you could lose control.
|
|
|
you will still have normal brake functions.
|
24.
When driving on slippery roads, you should NOT:
|
try to anticipate stops early.
|
|
|
use the engine brake.
|
|
|
watch far enough ahead to keep a steady speed.
|
|
|
go slowly.
|
25.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
|
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
|
|
|
checking the air brake system pressure gauge for signs of major air loss.
|
|
|
shutting the engine off so you can hear the brakes.
|
|
|
All of the above.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More