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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. What should you do if your vehicle gets stuck on the railroad tracks?
Call 911, then get out of the vehicle and away from the tracks.
Get out of the vehicle and away from the tracks as quickly as possible, then call 911.
Turn on the emergency flashers and call 911.
2. In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
100 to 120 psi
10 to 20 psi
20 to 45 psi
3. When inspecting the cargo, make sure it is:
secured properly for the first 50 miles after beginning a trip.
not overloaded.
piled up.
4. To secure the tractor you should:
Put on the parking brake and put the transmission in neutral.
Check that the kingpin and the fifth-wheel are aligned.
All of the above.
5. If you are feeling sleepy, you should:
slow down and drive on the shoulder of the road.
increase your speed to get to the destination quicker.
pull off the road and rest or take a nap.
6. Which of these statements about brakes is true?
The lighter the vehicle, the more heat the brakes absorb to stop it.
Brake fade does not result from excessive heat.
None of the above.
7. When the ______ closes, it stops any air from going out of the tractor.
height control valve
tractor protection valve
hand valve
8. _________ rigs are much more likely to roll over in an accident than _________ rigs.
Empty ; fully loaded
Fully loaded ; overloaded
Fully loaded ; empty
9. The tire load rating is stated:
on the side of each tire.
inside the suspension system.
on each axle.
10. Hydroplaning:
only occurs at extremely high speeds.
can occur at speeds as low as 30 mph.
only happens when tire pressure is higher than normal.
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NM Combination Test

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