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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.
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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.
A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:
2.
Driving a combination vehicle ____ than driving a single vehicle.
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Is easier
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Requires more driving skill
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Is better for training
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Is safer in inclement weather
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3.
To help prevent a rollover, cargo should be:
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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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4.
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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At the posted speed limit.
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5.
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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6.
If a trailer begins to jackknife, you should not:
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Release the brakes.
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Apply the trailer hand brake.
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Allow the wheels to grip the road.
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Allow the trailer to straighten out.
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7.
Simply changing lanes can cause:
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A “crack-the-whip” effect, resulting in a rollover.
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A trailer to straighten out.
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Confusion over which lane the driver is hoping to use.
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Other drivers to reduce their speed.
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