|
Release the brakes.
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|
|
Apply the trailer hand brake.
|
|
|
Allow the wheels to grip the road.
|
|
|
Allow the trailer to straighten out.
|
Massachusetts CDL Permit Test - Combination
(From the 2020 Massachusetts 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.
If a trailer begins to jackknife, you should not:
2.
Driving a combination vehicle ____ than driving a single vehicle.
|
Is easier
|
|
|
Requires more driving skill
|
|
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Is better for training
|
|
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Is safer in inclement weather
|
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
|
4.
To help prevent a rollover, cargo should be:
|
Placed as high as possible inside the trailer.
|
|
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Placed as low as possible inside the trailer.
|
|
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Placed on the passenger side of the trailer.
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Placed on the driver’s side of the trailer.
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5.
Trailers with low underneath clearance may be difficult to drive:
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On interstate highways.
|
|
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Over railroad crossings.
|
|
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On dirt roads.
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|
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At the posted speed limit.
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6.
A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:
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The stiff suspension springs and strong brakes will have high traction.
|
|
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The stiff suspension springs and strong brakes will have low traction.
|
|
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The brakes only operate when a trailer reaches a minimum weight.
|
|
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The suspension springs only operate when a trailer reaches a minimum weight.
|
7.
Simply changing lanes can cause:
|
A “crack-the-whip” effect, resulting in a rollover.
|
|
|
A trailer to straighten out.
|
|
|
Confusion over which lane the driver is hoping to use.
|
|
|
Other drivers to reduce their speed.
|
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