CDL Combination Test (2024) - FREE Florida Practice Test

1. When backing a tractor under a trailer:

you should lift the trailer off the fifth-wheel.
the trailer will be lifted slightly when the tractor backs under it.
the end of the kingpin will be even with the top of the fifth wheel.
the fifth-wheel will come out from under the trailer.

2. Blocking _______________ to keep it from sliding.

goes from the upper part of the cargo to the floor
is used in the front, back, and/or sides of a piece of cargo
is used only in the back of a piece of cargo
None of the above.

3. You are inspecting your vehicle during a trip. What should you do?

Check critical items such as tires, brakes, and lights.
Use your senses to check for problems.
Watch gauges for signs of trouble.
All of the above.

4. Overloading can have negative effects on:

5. If during vehicle inspection a tire is too hot to touch, you should:

make sure there is enough engine oil on the tires.
immediately decrease air pressure.
let air out.
remain stopped until the tire cools off.

6. In vehicles with air brakes, the tractor protection valve:

provides the air pressure used to operate trailer brakes.
carries air, which is controlled by the trailer hand brake or the foot brake.
is used to connect the service and emergency air lines from the truck/tractor to the trailer.
keeps air in the tractor or truck brake system.

7. If you must drive slowly, how should you alert following drivers?

Flash your brake lights
Help them out by signaling when it is safe to pass
Use your emergency flashers if it is legal
Turn on your taillights

8. What is countersteering?

Staying off the brake while steering to the right to avoid an accident.
Locking your wheels while turning in an emergency situation.
Driving too fast for conditions.
Turning the steering wheel quickly the other way after steering in an emergency situation.

9. The tire load rating is stated:

inside the suspension system.
on the dashboard.
on each axle.
on the side of each tire.

10. If your trucks has a high center of gravity, which of the following is true for curves?

You should slow down, as your truck can roll over at the posted speed limit for the curve.
Reduce your speed to a crawl.
You should travel at the posted speed limit.
None of the above.

COMBINATION PRACTICE TEST - FL CDL