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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Louisiana 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 Louisiana CDL Manual. Take this practice test now to prepare for the actual LA CDL combination test!
1. What happens when the center of gravity of a truck moves higher up from the road?
It becomes much easier to downshift at the right rpm.
The truck becomes easier to turn over.
The vehicle is more stable while turning.
It is easier it is to turn around corners.
2. Which of the following trailers can get stuck on raised crossings?
Moving van
Car carrier
All of the above.
3. A red triangle with an orange center means:
Slow-moving vehicle
The vehicle is hauling hazardous materials
Liquid tanker
Law enforcement vehicle
4. The two most important thingsĀ that a driver can do to prevent a rollover when driving a combination vehicle are:
Keeping cargo near the center of the vehicle and driving slowly on turns
Keeping cargo near the ground and driving slowly on the highway
Keeping cargo near center of vehicle and driving slowly on the highway
Driving slowly around turns and keeping the cargo as close to the ground as possible
5. When inspecting the coupling, check that the safety latch is:
in the "lock" position.
pushing against the kingpin.
in position over the locking lever.
None of the above.
6. When checking your tires during a pre-trip inspection, which of the following is acceptable?
Cracks in the tires
Tires made by different manufacturers
Dual tires that come in contact with parts of the vehicle
Mismatched sizes
7. Which of the following is NOT a warning sign of fatigue?
Driving at the speed of the traffic
Frequent blinking
Heavy eyelids
Trouble remembering the last few miles driven
8. Most truck driver deaths in crashes result from:
following too closely.
driving side-by-side with another truck.
truck rollovers.
9. The tire load rating is stated:
on the dashboard.
inside the suspension system.
on each axle.
on the side of each tire.
10. Glad hands are:
coupling devices.
securement devices.
warning devices.
electronic devices.
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LA Combination Test

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