CDL Doubles/Triples Test (2024) - FREE ND CDL Practice Test

1. If a vehicle is equipped with ABS, when you start the engine:

the spring brakes will come on.
the ABS indicator light on the dash should come on and then turn off.
the trailer emergency brakes will come on.
the wheels will lock up.

2. Because of the "crack-the-whip" effect, doubles and triples:

are much slower than other combination vehicles.
can go much faster than other combination vehicles.
are more likely to turn over than other combination vehicles.
are more likely to run out of gas than other combination vehicles.

3. When driving in heavy traffic, the safest speed is:

faster than the other vehicles.
slower than the other vehicles.
half the speed of the other vehicles.
the same speed as the other vehicles.

4. Strong winds can make it difficult to stay in your lane especially when driving:

5. To prevent rollover, you should:

place the cargo near the rear of the trailer.
place the cargo near the front of the trailer.
keep the cargo as close to the ground as possible.
put the lightest parts of the cargo under the heaviest parts.

6. Which of the following is not a braking system on a truck?

7. If you experience a loss of hydraulic pressure, you should do all of the following except:

Pump the brakes
Put the transmission in Neutral
Downshift
Use the parking brake

8. You should do an after-trip inspection:

9. When you turn suddenly, which trailer is most likely to turn over?

10. Excessive use of the service brakes results in overheating. Too much heat can:

cause the brakes to squeak.
cause the brakes apply unevenly.
cause the brakes to grab.
make the brakes stop working.

CDL DOUBLES PRACTICE TEST NORTH DAKOTA