CDL Doubles Triples Practice Test (2024)

1. What should you do if you doubt you have safe space to pass under a low bridge?

If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
Increase the weight of your vehicle to clearing under the bridge.
Go slowly, and take another route if you are not sure you can make it.

2. Most heavy duty vehicles use ___ air brake systems for safety.

3. When should you be particularly careful about high winds?

4. During freezing weather, which area is most likely to be slippery after it rains?

5. The heavier the vehicle:

the less work the brakes must do to stop it.
the higher the center of gravity will be.
the more work the brakes must do to stop it.

6. When a combination vehicle goes around a corner:

the driver must keep the rear of your vehicle far away from the curb.
the front and rear wheels follow a different path.
the rear wheels of the trailer will never off-track.

7. While crossing railroad tracks, you should:

8. In newer vehicles with air brakes, you put on the parking brake:

using a diamond-shaped, yellow, push-pull control knob.
placing the transmission in Park.
using a P-shaped, yellow control knob.

9. On dry pavement, the braking distance when traveling at 55 mph is about:

10. What is the minimum tread depth for tires other than front tires?

VA CDL DOUBLES TRIPLES PRACTICE TEST