FREE Hawaii CDL Combination Test 2024 (Practice Test)

1. Strong winds can make it difficult to stay in your lane, especially when:

2. If your vehicle gets stuck on the railroad tracks, you should:

check for identifiable landmarks to give the location of the crossing.
gather up your paperwork and shipping papers while calling 911, then get out of the vehicle.
get out of your vehicle and away from the tracks.

3. If your vehicle thumps or vibrates heavily, it may be a sign that:

4. The tractor protection valve:

controls the emergency brakes on combination vehicles.
keeps air in the tractor brake system should the trailer break away or develop a bad leak.
supplies air to the trailer air tanks.

5. When you park trailers without spring brakes, you should use wheel chocks:

to prevent the transmission from shifting up.
to keep the trailer from moving.
to prevent air from escaping.

6. Before connecting the converter dolly to the rear trailer, make sure that:

the shut-off valves at the rear of the first trailer are open.
the kingpin rests on the fifth-wheel.
the trailer height is slightly lower than the center of the fifth-wheel.

7. When you are uncoupling a loaded trailer, lower the landing gear until:

makes contact with the ground, and leave the trailer off the fifth wheel.
it makes firm contact with the ground.
the tractor frame is under the trailer.

8. While driving, you should use your mirrors to:

know where other vehicles are around you.
check where the rear of your vehicle is while you make turns.
All of the above.

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

10. When coupling, you should:

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

HI CDL COMBINATION TEST - PRACTICE TEST