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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Colorado CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Colorado CDL Manual. Take this practice test now to prepare for the actual CO CDL combination test!
1. Banked curves:
have a safe "design speed".
are reserved for pedestrians.
can be taken at any speed.
should always be avoided.
2. Which of the following trailers can get stuck on raised crossings?
Car carrier
Moving van
All of the above.
3. When driving at night you should:
keep the interior light on.
use your high beams when it is safe and legal to do so.
always use low beams.
All of the above.
4. Headlights:
can blind other drivers.
should not be used when driving at night.
must be turned on a half hour before sunset to a half hour after sunrise.
should be out of adjustment.
5. When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.
about 1/2 inch
enough space
no space
about 1 inch
6. Having ABS on only the trailer:
makes the trailer more likely to swing out.
still gives you more control over your vehicle during braking.
is very dangerous.
makes the trailer more likely to roll over.
7. During a trip:
you should watch gauges for signs of trouble.
you should watch gauges to make sure that valve caps are not missing.
you should not watch gauges as they can be misleading.
None of the above.
8. To prevent rollover, drivers of combination vehicles should:
keep the load is to one side.
brake while turning.
make sure the cargo is not centered and spread out.
keep the cargo as close to the ground as possible.
9. A burning tire must be:
immediately removed from the vehicle.
cooled with water.
covered with cloth.
None of the above.
10. If your cargo only fills one-third of the length of your trailer, make sure your cargo is:
loaded so there is a high center of gravity.
centered and spread out as much as possible.
to one side and as close to the ground as possible.
piled up high with heavy cargo on top.
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CO Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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