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To accelerate in rural areas.
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Only to test the trailer brakes.
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Together with the brake pedal.
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On slippery surfaces.
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Wyoming CDL Permit Test - Combination
(From the 2021 Wyoming CDL driver handbook)
| 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.
Passing grade —
4 or fewer errors
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1.
The trailer hand valve should be used:
2.
Pushing in the trailer air supply control will:
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Supply the trailer with air.
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Deactivate the air brakes.
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Prevent the vehicle from skidding.
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3.
If you are backing and become unsure about your path of travel, you should:
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Continue backing.
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Stop and get out to look.
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Continue backing, but more slowly than before.
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4.
How much space should be between the upper and lower fifth wheel?
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About five inches of space
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A maximum of two inches of space
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No space
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5.
Push in the trailer air supply control to:
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Activate the emergency brakes.
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Deactivate the air brakes.
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Sound the horn.
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Supply the trailer with air.
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6.
An air supply control in its "emergency" position will:
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Turn on the air supply.
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Apply the trailer emergency brakes.
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Prevent a skid.
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Accelerate the vehicle.
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7.
What is the Johnson bar?
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A hand valve that works the trailer brakes
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A valve that indicates the fuel level
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A valve that limits the amount of cargo
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