FREE AL CDL Combination Test (2024)

1. Empty trucks have the best braking. True or False?

2. Fully loaded rigs:

are much more likely to roll over than empty rigs.
are just as likely to roll over as empty rigs.
are less likely to roll over than empty rigs.
None of the above.

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

4. At speeds below 40 mph, you should leave at least one second in front of you for each ___ feet of vehicle length.

5. When you drive a tractor-trailer combination with ABS, you should:

apply the trailer hand brake whe braking.
pump the brakes.
always apply the brakes hard.
brake as you always have.

6. The emergency air line does NOT:

pump air into the relay valves, allowing the trailer brakes to be applied more quickly.
control the emergency brakes on combination vehicles.
supply air to the trailer air tanks.
cause the tractor protection valve to close when the emergency line loses pressure.

7. Cargo tie-downs are used to:

prevent skidding.
prevent right-turn accidents.
keep cargo from shifting or falling.
prevent freezing.

8. After coupling the trailer, begin raising the landing gear by using:

9. A trailer jackknife is more likely to happen when the trailer is:

10. When coupling, you should:

make sure the trailer kingpin is bent.
be aware that wrong coupling and uncoupling can be very dangerous.
make sure the sliding fifth-wheel is locked.
make sure the trailer wheels are not chocked.

AL CDL COMBINATION PRACTICE TEST