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Nebraska CDL Permit Test - Combination
(From the 2021 Nebraska CDL driver handbook)
| Number of questions: | 25 |
| Passing score: | 20 |
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 Nebraska 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 25 multiple-choice questions, and applicants will need to correctly answer a minimum of 20 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
Passing grade —
5 or fewer errors
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1.
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
2.
Place the trailer air supply control in its "emergency" position to test:
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The trailer emergency brakes.
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A coupling device.
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The anti-lock brakes.
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3.
How many air lines does a combination vehicle have?
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One
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Two
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Three
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Four
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4.
Trailers with low underneath clearance can present challenges when driving over:
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Bridges.
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Railroad tracks.
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Overpasses.
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5.
When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
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Sound your horn.
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Make sure there is a large enough gap for your vehicle.
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Expect other drivers to make room for your vehicle.
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Let other drivers wave you into their lane.
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6.
Which type of vehicle is most prone to the “crack-the-whip” effect?
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A five-axle tractor semi-trailer
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A three-axle tractor semi-trailer
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A bobtail tractor
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A triple trailer
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