CDL Doubles Triples Practice Test (2024)

1. Which of the following is not a sign of fatigue?

2. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.

3. Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?

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

5. If you are carrying a heavy load that is slowing you down, you should:

drive on the shoulder.
keep the vehicle in third gear.
drive in the left lane.
drive in the right lane.

6. Strong winds can make it difficult to stay in your lane, especially when:

driving alongside other vehicles.
coming out of tunnels.
going into tunnels.
driving at speeds below 40 mph.

7. The earliest way to recognize that your trailer has started to skid is:

by hearing squeaking noises from the wheels.
by checking the jackknife sensor.
by releasing the brakes.
by checking your mirrors.

8. ABS helps you:

decrease your average speed.
decrease your overall stopping distance.
keep the wheels from locking up.
lock your wheels.

9. What happens when the center of gravity of a truck moves higher up from the road?

It is easier it is to turn around corners.
The truck becomes easier to turn over.
The vehicle is more stable while turning.
It becomes much easier to downshift at the right rpm.

10. Rollovers happen when drivers:

SC CDL DOUBLES TRIPLES PRACTICE TEST