CDL Combination Test (2024) - FREE Colorado CDL Practice Test

1. What are the two basic reasons for covering cargo?

To protect people from spilled cargo and the cargo from weather.
To protect the cargo from pilferage and from weather.
To protect the cargo from weather and to avoid littering.
To protect people from spilled cargo and the cargo from pilferage.

2. Hanging meat in a refrigerated truck can be:

a very stable load if properly distributed.
a very stable load with a low center of gravity.
a very unstable load with a high center of gravity.
a very unstable load with a low center of gravity.

3. When you park trailers without spring brakes, you should use wheel chocks:

to keep the trailer from moving.
to prevent overheating.
to prevent air from escaping.
to prevent the transmission from shifting up.

4. If your truck has automatic transmission, you should downshift:

after entering a curve.
when going down grades.
when you need to accelerate.
whenever road conditions allow.

5. The first thing to do when coupling a tractor-semitrailer is to:

6. "Bobtail" tractors are:

tractors with two trailers.
tractors with a tank.
heavily loaded trailers.
tractors without semitrailers.

7. When checking the lights before driving:

the engine must be running.
you should check them from inside the vehicle.
make sure the parking brake is not set.
you should turn off the engine.

8. To reduce the chance of rollover, you should:

put the lightest parts of the cargo under the heaviest parts.
place the cargo as high as possible inside the trailer.
distributed the cargo as low as possible inside the trailer.
None of the above.

9. The emergency air line:

controls the emergency brakes on combination vehicles.
causes the tractor protection valve to close when the emergency line loses pressure.
supplies air to the trailer air tanks.
All of the above.

10. After starting the engine, oil pressure should rise to a normal level:

COMBINATION TEST COLORADO - PRACTICE TEST