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To test the trailer brakes.
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|
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To check the connection between the trailer and tractor.
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To accelerate.
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Mississippi CDL Permit Test - Combination
(From the 2021 Mississippi 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.
The trailer hand valve should be used:
2.
A combination vehicle has:
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One air line.
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Two air lines.
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Three air lines.
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Four air lines.
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3.
If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
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Using the air brakes.
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Using wheel chocks.
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Parking near a wall.
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Parking on a slight incline.
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4.
Combination vehicles need extra space on the road because they:
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Drive more slowly than other commercial motor vehicles.
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Are heavier than other commercial motor vehicles.
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Need more space to turn and stop than other commercial motor vehicles.
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5.
What can the “crack-the-whip” effect do?
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Turn over trailers.
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Make loud noises.
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Make trucks accelerate.
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Make trucks decelerate.
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6.
What does the trailer air supply control look like?
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It is a square blue knob.
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It is a triangular yellow knob.
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It is an eight-sided red knob.
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It is a circular orange knob.
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7.
Rollovers happen when:
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Drivers turn too quickly.
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Drivers turn too slowly.
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|
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It is raining.
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