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Wyoming CDL Permit Test - Combination

Number of questions: 20
Passing score: 16
Directions: All applicants who are applying for a Class A CDL should be prepared to take the Combination test. This test covers information found in Section 6 of the Wyoming Driver License Manual for Commercial & Heavy Vehicles. Section 6 provides the information needed to safely operate tractor-trailers, doubles, triples, and straight trucks with trailers. The test is made up of 20 multiple-choice questions, and applicants will need to correctly answer a minimum of 16 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
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Passing grade —
4 or fewer errors
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8.
If a trailer begins to skid, the driver should:
Lock the brakes.
Release the brakes.
Steer in the opposite direction.
Accelerate.
9.
How many air lines does a combination vehicle have?
One
Two
Three
Four
10.
Push in the trailer air supply control to:
Activate the emergency brakes.
Deactivate the air brakes.
Sound the horn.
Supply the trailer with air.
11.
If a trailer begins to jackknife, you should not:
Release the brakes.
Apply the trailer hand brake.
Allow the wheels to grip the road.
Allow the trailer to straighten out.
12.
What is a bobtail tractor?
A tractor without a semi-trailer
A tractor with two semi-trailers
A tractor that travels faster than the speed limit
13.
If a load is placed on one side of a trailer, the trailer:
May lean during turns.
May add extra support during turns.
May be easier to steer during turns.
14.
When coupling:
You can assume all vehicles are the same.
Be sure that you are coupling correctly.
Cracks in the mounting are acceptable.
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