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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Wyoming CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Wyoming CDL Manual. Take this practice test now to prepare for the actual WY CDL combination test!
1. Do not use the trailer hand valve in driving because:
of the danger of making the trailer skid.
the brakes can overheat and lose their braking power.
the trailer emergency brakes will come on.
All of the above.
2. To prevent rollover, drivers of combination vehicles should:
keep the load is to one side.
keep the cargo as close to the ground as possible.
brake while turning.
make sure the cargo is not centered and spread out.
3. To unlock the fifth wheel, pull the release handle to the _______ position.
4. When checking air brakes on combination vehicles, which of the following is NOT part of checking that air flows to all trailers?
Pulling tractor forward until the fifth-wheel comes out from under the trailer.
Opening the emergency line shut-off valve at the rear of the last trailer.
Going to the rear of the rig.
Using the trailer handbrake to provide air to the service line.
5. When should you use the hand valve to park a combination vehicle?
To park at loading docks.
When parking downhill.
6. When you have to back, you should always try to back toward the driver's side. Why?
You can see better and watch the rear of your vehicle by looking out the side window.
Backing toward the left side is more dangerous.
You can watch the front of your vehicle by looking out the side window.
All of the above.
7. Which of the following is NOT part of inspecting the coupling?
Making sure there is no space between the upper and the lower fifth-wheel
Making sure the fifth-wheel jaws have closed around the shank of the kingpin.
Checking for enough clearance between the rear of the tractor frame and the landing gear.
Checking that the locking lever is in the "lock" position
8. At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________  to be sure it is safe to proceed.
stop, look, and listen
go, look and put the transmission in neutral
go, stop and listen
listen, look and stop
9. Tar in the road pavement rising to the road surface in very hot weather:
does not affect the road surface or driving conditions.
causes the road to become very slippery.
might get in your engine.
is very sticky and will slow down your vehicle.
10. If an item placed on a flatbed trailer is 7 feet long, it should have __ tie-downs.
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WY CDL Combination Test

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