CDL
Courses
Ukrainian
English
Ukrainian
Russian
Tajik
Kazakh
Login
Головна
CDL
Permit
Florida
Combination Vehicles #7
Practice Test
How do you know if the test for the tractor protection valve worked right?
The air tanks will rapidly fill up when the valve is tested.
The truck protection valve control will pop out or go from normal to emergency.
The headlights will flash on and off.
Correct: 0
Incorrect: 0
Skipped: 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Restart The Test
Go To Another Test