arrow
  1. Driving Test Pro
  2. Iowa CDL Tests
  3. Class A - Test
  4. Page 12

2025 IA CDL Practice Test: Class A - Test

Based on 2025 IA CDL Handbook
12. What color is the trailer air supply knob?
A
Black.
B
Green.
C
Red.
D
Yellow.
Next
More
12/30
Progress
0
Errors
Restart
Next
Next
Class A - Test 1
  • Back to Test List
  • Bus - Test 3
  • Class A - Test 2
  • Challenge Library
    12

More IA CDL Practice Tests

2
Class A - Test 2
3
Class A - Test 3
4
Class A - Test 4
5
Class A - Test 5
6
Class A - Test 6
7
Class A - Test 7
8
Class A - Test 8
9
Class B - Test
10
Class B - Test 2
11
Class B - Test 3