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Drivers who want to drive combination vehicles must pass the combination vehicles test. The New Mexico 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 New Mexico CDL Manual. Take this practice test now to prepare for the actual NM CDL combination test!
1. Which of the following is NOT a good rule for using turn signals?
Signal continuously until you have completed the turn.
Cancel your signal after you have turned.
Put your turn signal on after the turn.
2. If your vehicle has dummy couplers, why should you use them when the air lines are not connected to a trailer?
Because if you don't, you will never build system pressure.
To prevent water and dirt from getting into the coupler and the air lines.
To prevent overheating.
3. When you make a quick lane change, the crack-the-whip effect can:
turn the trailer over.
improve your traction.
make it harder to turn without skidding.
4. If you get stuck on the railroad tracks, the first thing you should do is:
scream for help.
stay in your vehicle and call 911.
immediately get out of the cab and move away from the tracks.
5. ABS helps you:
avoid wheel lock up and maintain control of your vehicle when you brake.
steer gently and smoothly while you are braking.
increase your normal braking capability.
6. Tests have shown that trucks with a high center of gravity:
can roll over if the driver exceeds the posted speed limit for a curve.
can roll over at the posted speed limit for a curve.
are less likely to roll over when entering a curve.
7. When a vehicle goes around a corner, the rear wheels:
follow a different path than the front wheels.
will turn freely.
follow the same path as the front wheels.
8. On a tractor-trailer equipped with a trailer brake hand valve, the hand valve can be used to:
hold compressed air.
prevent movement of cargo.
keep from rolling back.
9. During a trip:
you should not watch gauges as they can be misleading.
you should watch gauges to make sure that valve caps are not missing.
you should watch gauges for signs of trouble.
10. If driving a heavy vehicle, you should:
try to pass other vehicles going uphill.
stay in the left lane.
stay in the right lane.
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NM CDL Combination Test

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