SC CDL AIR BRAKES PRACTICE TEST
16.
Older trailers do not have spring brakes. If the air supply leaks away:
|
the trailer will stop normally.
|
|
|
there will be no emergency brakes.
|
|
|
the ABS won't work properly.
|
|
|
All of the above.
|
17.
When you push the brake pedal down, air brakes work:
|
after a short delay.
|
|
|
immediately.
|
|
|
after about 15 seconds.
|
|
|
only when ABS is working.
|
18.
One way to prevent hydroplaning is to:
|
have less than 4/32 inch tread depth in every major groove on front tires.
|
|
|
use the controlled braking method.
|
|
|
make sure you have enough tread on your tires.
|
|
|
take curves at higher speeds.
|
19.
In air brake vehicles, the parking brake should be used:
|
as little as possible.
|
|
|
any time you park (with a few exceptions).
|
|
|
when the spring brakes are on.
|
|
|
to hold your speed while going downhill.
|
20.
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.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More