FREE OK CDL Combination Test (2024)

1. Combination vehicles have __ air lines.

2. Under-loaded front axles can:

make the steering axle weight too light to steer safely.
cause poor traction.
All of the above.

3. On any upgrade, gravity:

4. Glad hands are used to:

connect the electrical lines from the truck or tractor to the trailer.
connect the service and emergency air lines from the truck or tractor to the trailer.
connect the brakes from the truck or tractor to the trailer.

5. If a load is 10 feet long, the minimum number of tie-downs required is:

6. During a trip:

you should watch gauges to make sure that valve caps are not missing.
you should watch gauges for signs of trouble.
you should not watch gauges as they can be misleading.

7. When driving in very hot weather, the heat will increase the chances of:

8. If you feel drowsy while driving, what should you do?

Turn on the radio to keep you awake.
Pull off the road and get some sleep.
Get an energy drink.

9. When driving on slippery surfaces, you should:

not pass slower vehicles unless necessary.
change lanes often.
make turns as quickly as possible.

10. Headlights:

must be turned on a half hour before sunset to a half hour after sunrise.
can blind other drivers.
should not be used when driving at night.

OK CDL COMBINATION PRACTICE TEST