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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. If you get stuck on railroad tracks, you should:
have a helper push your vehicle.
get out of the vehicle and away from the tracks.
stay in the vehicle and call for help.
check the engine compartment quickly.
2. When backing a trailer, you should:
avoid correcting the drift.
try to position your vehicle so you can back in a straight line.
never make pull-ups to reposition your vehicle.
turn the steering wheel in the direction you want to go.
3. If are being followed closely, you should:
change lanes quickly.
flash your brake lights.
decrease your following distance.
increase your following distance.
4. If you're feeling tired while driving you should:
increase your speed to get to your destination quicker.
drink coffee.
eat something.
stop driving and get some rest.
5. When approaching a vehicle with a distracted driver, you should:
maintain your safe following distance.
sound your horn.
change lanes quickly.
quickly pass the vehicle.
6. What factors can cause brakes to fail or fade?
Not relying on the engine braking effect
Brakes out of adjustment
Excessive use of the service brakes
All of the above.
7. If you begin to feel drowsy while driving, you should:
get some coffee.
open your window.
get an energy drink.
pull off the road and get some rest.
8. Tests have shown that trucks with a high center of gravity:
can roll over at the posted speed limit for a curve.
can roll over if the driver slows down before entering a curve.
are less likely to roll over when entering a curve.
can roll over if the driver exceeds the posted speed limit for a curve.
9. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
The front trailer is twice as likely to turn over as the tractor.
The rear trailer is twice as likely to turn over as the tractor.
All trailers are equally likely to turn over.
None of the above.
10. You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.
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LA CDL Combination Test

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