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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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Arkansas CDL Permit Test - Combination
(From the 2021 Arkansas 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 Commercial Driver License Manual. 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 off-tracking?
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When a vehicle’s front wheels follow a different path than its rear wheels
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When a vehicle's wheels all follow the exact same path
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When a load shifts during a turn
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When a vehicle's wheels run over a curb during a turn
|
3.
What is a tractor protection valve?
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A valve to keep air in the brake system should there be a bad leak
|
|
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A valve that prevents a truck from being stolen
|
|
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A valve that prevents the driver from driving too fast
|
4.
When braking while pulling a trailer equipped with anti-lock brakes, you should:
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Pump the brakes.
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Use extra braking force to ensure the brakes kick in.
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Brake as you would without anti-lock brakes.
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5.
In a combination rig, it is best to make:
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Quick, sudden stops.
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Sharp turns.
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Quick accelerations.
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Slow, planned stops.
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6.
When should the trailer hand valve be used?
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Only when the trailer is carrying a load
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|
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Only to test the trailer’s brakes
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|
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Only in inclement weather when the trailer may skid
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7.
A driver should test the tractor protection valve by:
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Pulling the yellow, diamond-shaped knob.
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|
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Releasing air with the brake pedal.
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|
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Unlocking the trailer doors.
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