# Free Connecticut CDL Combination Vehicles Practice Test 2023

Our CDL practice tests:
Based on 2021 CT commercial driver's license manual
Perfect for first-time, renewal applicants
CT 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.
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.
3.
After you supply air to the trailer, make sure the air lines are not crossed and the trailer brakes are working. This is done by:
4.
In order to allow the trailer brakes to be applied more quickly, what is connected to the service air line?
5.
Tractor with a ______ trailer requires the shortest amount of stopping distance.
6.
There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns, and (2):
7.
When driving a combination vehicle with multiple trailers or dollies, all air shut-off valves except the last one at the back must be:
8.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
9.
To stop other drivers from passing you on the right when turning wide ____.
10.
The locking jaws should be around:
11.
When should you use the hand valve to park a combination vehicle?
12.
When you notice that your trailer has lost traction and is going into a skid, you should:
13.
The best and earliest way to recognize that your trailer has started to skid is ____.
14.
If the spring brakes are not released when you pushed the trailer air supply valve you should:
15.
Why should you be sure that the fifth wheel plate is greased as required?
16.
Rocky mountain doubles have a rearward amplification of about:
17.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
18.
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
19.
When coupling, the proper position of the fifth wheel is:
20.
In case of landing gear failure while pulling out from under it, you should: