CDL Combination Test (2024) - FREE Pennsylvania Practice Test

1. Which of the following statements about off-tracking is true?

When a vehicle goes around a corner, the rear wheels follow the same path as the front wheels.
Longer vehicles off-track less.
If there is more than one trailer, the rear wheels of the last trailer will off-track the most.
None of the above.

2. It's very important to distribute the cargo so it is:

3. Before leaving your vehicle unattended, you should:

4. On any upgrade, gravity:

5. The crack-the-whip effect:

can cause a vehicle to tilt.
can turn the trailer over.
can cause problems for drivers coming toward you.
the ends of some vehicles to drag.

6. If your truck catches fire, the first thing you should do is to:

get off the vehicle, open the hood and start shooting foam to keep the engine cool.
pull off the road and park in an open area.
get the vehicle off the road and park near other vehicles.
pull into a service station and call for help.

7. If you cannot make a right turn without entering another traffic lane, you should:

swing wide to the left before starting the turn.
turn wide as you complete the turn.
turn wide before you start the turn.
watch out for vehicles coming toward you and back up for them.

8. When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?

if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
The air could leak out of the trailer air tank, releasing its emergency brakes.
You may not notice a major leak in the service line until you try to put the brakes on.
None of the above.

9. Which of the following is NOT part of the procedure to stop a trailer skid?

Releasing the brakes
Not using the hand brake
Using the trailer hand brake to get traction back
Recognizing the skid

10. When looking at your cargo covers in the mirrors while driving, you must be aware that a flapping cover:

can tear loose, uncovering the cargo.
keeps the cargo cool.
helps keep the cargo as close to the ground as possible.
means that the cargo is balanced.

COMBINATION PRACTICE TEST - PA CDL