WY CDL Combination Practice Test (2025)

1. An Anti-lock Braking System (ABS):

lets you drive faster.
always shortens your stopping distance.
increases your normal braking capability.
keeps your wheels from locking up when you brake hard.

2. When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.

5
10
4
6

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

empty.
overloaded.
loaded to its full capacity.
None of the above.

4. The person watching the loading or unloading of a cargo tank must be within _______ of the tank.

5 feet
25 feet
15 feet
50 feet

5. The best way to recognize that your trailer has started to skid is:

by hearing squeaking noises from the wheels.
by using retarders.
by seeing it in your mirrors.
None of the above.

6. Which of the following is NOT a warning sign of fatigue?

Driving at the speed of the traffic
Heavy eyelids
Trouble remembering the last few miles driven
Frequent blinking

7. A high center of gravity means:

the spring brakes will come fully on.
you are more likely to tip over.
a rollover is less likely.
you'll have better traction.

8. If a drawbridge does not have a signal light or traffic control attendant, you should:

drive through the drawbridge with caution.
get through the drawbridge as quickly as possible.
stop and look to make sure the draw is completely closed before crossing.
stop at least 5 feet before the draw of the bridge.

9. If driving a new vehicle, you should familiarize yourself with the controls and equipment:

within the first 50 miles.
before you start driving.
as you drive.
after pulling into a service station.

10. You are coupling a tractor to a semi-trailer. You have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should:

connect the electrical cord and check the air lines.
supply air to the trailer system and lock the trailer brakes.
begin raising the landing gear.
remove the wheel chocks.

Number of questions:	20
Correct answers to pass:	16
Passing score:	80%

CDL COMBINATION PRACTICE TEST (WY)

WY CDL Combination Test