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Emergency
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Supply
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Normal
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Kentucky CDL Permit Test - Combination
(From the 2020 Kentucky 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
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1.
When you are pulling a trailer, the air supply control lever should be in its ____ position.
2.
Rearward amplification refers to:
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The amount of noise projected to the rear of a vehicle.
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The cause of the "crack-the-whip" effect.
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The number of trailers that can be pulled by a tractor.
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3.
Fully-loaded rigs:
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Usually are very responsive to steering.
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Are more likely to roll over than empty rigs.
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Can stop quickly.
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4.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:
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In the same way as they would be in a vehicle without ABS.
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As the vehicle is placed in neutral.
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With the hand brake.
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5.
Trailers built before ____ are not required to have spring brakes.
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1985
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1975
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1999
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6.
When driving with trailers, you should:
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Make quick, sudden changes.
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Avoid making sudden moves.
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Accelerate by pushing the accelerator to the floor.
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7.
If unsure if a trailer has an Anti-Lock Braking System (ABS), you can:
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Look under the trailer for wheel speed sensors coming from the back of the brakes.
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Remove a tire and look for the ABS sensor on the axle.
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Assume it does have ABS.
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