FREE North Dakota CDL Doubles & Triples Practice Test (2023)

1. On front tires, tread should be at least:

2. Which of the following is most likely to roll over?

The rear trailer of a triple
The front trailer of a double
The middle trailer of a triple
The rear trailer of a double

3. In a dual air brake system, if one air system is very low on pressure:

you should pump the brakes to restore pressure.
you should drive and brake as you always have.
either the front or rear brakes will not be operating fully.
the effect won't be noticeable for the first 50 miles.

4. To prevent rollover, you should do all of the following except:

keep the load centered on your rig.
drive slowly around turns.
avoid quick lane changes.
put the lightest parts of the cargo under the heaviest parts.

5. When approaching a double railroad track, you should:

remember that a train on one track may hide a train on the other track.
remember that trains may be more frequent.
rely upon the presence of warning signals.
expect to hear a train when it's approaching.

6. Before operating the vehicle, the driver should:

rely on the last vehicle inspection and skip the pre-trip inspection.
should not review the vehicle inspection report and immediately try to find any vehicle defects.
review the last vehicle inspection report.
None of the above.

7. With an engine fire, you should:

turn the engine off as soon as possible.
open the hood as soon as possible.
not shoot foam from the vehicle’s underside.
All of the above.

8. Longer combination vehicles have the tendency to swing wide on turns. This is called:

9. What factors can cause brakes to fade?

Slippery surfaces and shaded areas.
Gravel and tar.
Dirt roads and in unpaved yards.
Excessive heat and brakes out of adjustment.

10. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.

CDL DOUBLES TRIPLES PRACTICE TEST NORTH DAKOTA