FREE AR CDL Combination Test (2024)

1. Glad hands are:

2. Blocking and bracing are:

coupling devices used to connect the service air lines from the truck or tractor to the trailer.
driving techniques used to regain control when your drive wheels start to skid.
used to keep cargo from sliding and to prevent movement of cargo.
None of the above.

3. When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.

4. What is the proper following distance for a 50 foot truck traveling at 50 mph?

5. Most hydraulic brake failures occur for one of two reasons, one of which is:

loss of hydraulic pressure.
excessive downshifting.
relying too much on the engine braking effect.
driving in cold weather.

6. Under a pressurized system, the radiator cap:

should be removed when the coolant is hot.
should never be hot.
should never be removed until the system has cooled.
should always be cool.

7. After starting the engine, the ABS light stays on. This means:

the ABS oil level is not adequate.
the ABS is in Neutral.
the ABS is working properly.
the ABS is not working properly.

8. Strong winds can make it difficult to stay in your lane, especially when:

going into tunnels.
coming out of tunnels.
driving at speeds below 40 mph.
driving alongside other vehicles.

9. The front trailer supports are up, and the trailer is resting on the tractor. Make sure:

the electrical and air connections are properly connected between the tractor and the trailer.
there is enough clearance between the top of the tractor tires and the nose of the trailer.
there is enough clearance between the rear of the tractor frame and the landing gear.
All of the above.

10. When inspecting the coupling, make sure ________ between the upper and the lower fifth-wheel.

AR CDL COMBINATION PRACTICE TEST