2025 Virginia Cdl Class B Knowledge Test - 1
The following questions are from real Virginia CDL practice tests. After selecting the answer, you can see the explanation. After confirming, click "Next" to jump to the next question.
ADVERTISEMENT
1. A ____ allows a driver to gradually apply spring brakes.
Modulating control valve
Trailer air supply control
Relay valve
ADVERTISEMENT
Key Data
Number of Tests: 18
Number of Question: 50
Passing Score: 40
Free Useful Tools
Dmv Near Me 
Auto Loan Calculator 
Auto Insurance Calculator 
Vehicles Buying Advice Progress
0 Incorrect
0 Correct
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Rate This Test
Please rate this test