|
Supply the trailer with air.
|
|
|
Deactivate the air brakes.
|
|
|
Prevent the vehicle from skidding.
|
Wyoming CDL Permit Test - Combination
(From the 2020 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
advertising
1.
Pushing in the trailer air supply control will:
2.
What is the Johnson bar?
|
A hand valve that works the trailer brakes
|
|
|
A valve that indicates the fuel level
|
|
|
A valve that limits the amount of cargo
|
3.
An air supply control in its "emergency" position will:
|
Turn on the air supply.
|
|
|
Apply the trailer emergency brakes.
|
|
|
Prevent a skid.
|
|
|
Accelerate the vehicle.
|
4.
The trailer hand valve should be used:
|
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.
|
5.
How much space should be between the upper and lower fifth wheel?
|
About five inches of space
|
|
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A maximum of two inches of space
|
|
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No space
|
6.
Push in the trailer air supply control to:
|
Activate the emergency brakes.
|
|
|
Deactivate the air brakes.
|
|
|
Sound the horn.
|
|
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Supply the trailer with air.
|
7.
If you are backing and become unsure about your path of travel, you should:
|
Continue backing.
|
|
|
Stop and get out to look.
|
|
|
Continue backing, but more slowly than before.
|
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