FREE NM CDL Doubles Triples Practice Test (2024)

1. When driving a truck with more than 1 trailer, drivers should:

allow more following distance.
be especially careful in adverse conditions.
All of the above.

2. Overloading a vehicle with cargo can have negative effects on all of the following except:

3. If you must stop on a one-way or divided highway, place your warning devices:

100 feet, 200 feet, and 300 feet toward the approaching traffic.
10 feet, 50 feet, and 150 feet toward the approaching traffic.
10 feet, 100 feet, and 200 feet toward the approaching traffic.

4. The tractor protection valve:

keeps air in the brake system should the trailer develop a bad leak.
prevents the trailer from being accidentally released.
keeps your wheels from locking up when you brake hard.

5. When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:

the trailer emergency brakes will come on.
the tractor will lose all air pressure.
the trailer supply valve will stay open.

6. During a trip you need to inspect the cargo and its securing devices:

7. You should always try to back toward the driver's side because:

backing toward the left side is more dangerous.
you can watch the rear of your vehicle out the side window.
None of the above.

8. If your vehicle is hydroplaning, you should:

9. You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:

apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
increase your speed to approximately 45 mph, and then apply release the brakes.

10. The weight of a truck:

has no effect on stopping distance.
has an impact on stopping distance.
is not as important as the vehicle's center of gravity in determining stopping distance.

NEW MEXICO DOUBLES TRIPLES PRACTICE CDL TEST