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Arkansas 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 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.
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1.

When should the trailer hand valve be used?

Only when the trailer is carrying a load
Only to test the trailer’s brakes
Only in inclement weather when the trailer may skid
2.

A driver should test the tractor protection valve by:

Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
3.

What is a tractor protection valve?

A valve to keep air in the brake system should there be a bad leak
A valve that prevents a truck from being stolen
A valve that prevents the driver from driving too fast
4.

Pushing in the trailer air supply control will:

Supply the trailer with air.
Deactivate the air brakes.
Prevent the vehicle from skidding.
5.

In a combination rig, it is best to make:

Quick, sudden stops.
Sharp turns.
Quick accelerations.
Slow, planned stops.
6.

When braking while pulling a trailer equipped with anti-lock brakes, you should:

Pump the brakes.
Use extra braking force to ensure the brakes kick in.
Brake as you would without anti-lock brakes.
7.

What is off-tracking?

When a vehicle’s front wheels follow a different path than its rear wheels
When a vehicle's wheels all follow the exact same path
When a load shifts during a turn
When a vehicle's wheels run over a curb during a turn
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