CDL Air Brakes Practice Test - Rhode Island
21.
You are going down a steep grade. Once the vehicle is in the proper low gear, you should brake just hard enough to feel a slowdown, and then release the brakes when your speed has been reduced to ____ below your safe speed.
|
10 mph
|
|
|
15 mph
|
|
|
5 mph
|
22.
The best way to know what's going on behind and to the sides of your vehicle is to:
|
use the rear view camera.
|
|
|
check your mirrors regularly.
|
|
|
lean out of the window.
|
23.
Most heavy duty vehicles use ___ air brake systems for safety.
|
single
|
|
|
triple
|
|
|
dual
|
24.
To control your speed on a downgrade, you should:
|
use controlled braking.
|
|
|
fully apply the brakes.
|
|
|
use engine braking.
|
25.
You supply air to the trailer brake system by:
|
connecting the tractor service air line to the trailer service glad hand.
|
|
|
plugging the electrical cord into the trailer.
|
|
|
pushing in the trailer air supply knob.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More