# Free Arkansas CDL Combination Vehicles Practice Test 2023

Our CDL practice tests:
Based on 2021 AR commercial driver's license manual
Perfect for first-time, renewal applicants
AR CDL Combination Vehicles Test format:
20 questions
80% passing score
List of questions
1.
When a vehicle goes around a corner, the rear wheels follow a different path than the front. This is called:
2.
You should not back a tractor under a trailer until the air system is:
3.
The trailer air supply control knob is _____.
4.
While driving behind another vehicle, under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each ____ feet of your vehicle length.
5.
When inspecting the coupling area, all of the following are required, EXCEPT:
6.
Hose couplers are also referred to as:
7.
Spring brakes are not required on trailers and dollies built before:
8.
If your trailer goes into a skid, you should do all of the following, EXCEPT:
9.
When uncoupling, make sure that the parking area:
10.
Tractor with a ______ trailer requires the shortest amount of stopping distance.
11.
If the service line comes apart while you are driving a combination vehicle, but the emergency line stays together, what will happen right away?
12.
When pulling trailers:
13.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
14.
To help release the fifth wheel locking lever:
15.
Crack-the-whip effect occurs when:
16.
In normal driving, some drivers use the hand valve before the brake pedal to prevent a jack-knife. Which of the statements is true?
17.
All of these are part of the final 3 steps of uncoupling the trailer, EXCEPT:
18.
Rocky mountain doubles have a rearward amplification of about:
19.
When coupling, the proper position of the fifth wheel is:
20.
When driving a set of doubles, it is necessary to close which shut-off valve in the last trailer: