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Are less likely to roll over than empty rigs.
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|
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Are more likely to roll over than empty rigs.
|
|
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Are just as likely to roll over as empty rigs.
|
|
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Should not be driven.
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North Carolina CDL Permit Test - Combination
(From the 2021 North Carolina 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 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
advertising
1.
Fully-loaded rigs:
2.
A tractor protection valve is:
|
A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
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|
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A device that prevents theft.
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|
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A device that controls fuel levels.
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|
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A device that allows the battery to recharge efficiently.
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3.
Place the trailer air supply control in its "emergency" position to test:
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The trailer emergency brakes.
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|
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A coupling device.
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The anti-lock brakes.
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4.
Which of the following will not help prevent a rig from rolling over?
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Keeping the cargo as close to the ground as possible
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Driving slowly around turns
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Driving on the shoulder of a road
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5.
Before backing your tractor under the trailer, make sure your trailer brakes are:
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Disengaged.
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|
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Locked.
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Deactivated.
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Dry.
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6.
An air supply control lever should be in its "normal" position when you are:
|
Changing a tire.
|
|
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Applying the trailer emergency brakes.
|
|
|
Pulling a trailer.
|
|
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Using your spring brakes.
|
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