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The suspension springs to extend.
|
|
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The tractor protection valve to open.
|
|
|
The rear trailer to detach from the combination.
|
|
|
The emergency brakes to activate.
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Florida CDL Permit Test - Combination
(From the 2021 Florida 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 have one hour to correctly answer a minimum of 16 questions. The Combination test is not a replacement for the Double/Triple endorsement test.
Passing grade —
4 or fewer errors
advertising
1.
A loss of air pressure in the emergency line will cause:
2.
Pull out the trailer air supply control to test:
|
The parking brake.
|
|
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The trailer emergency brakes.
|
|
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The trailer service brakes.
|
|
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The landing gear.
|
3.
Rollovers are most likely to happen when:
|
Drivers turn too fast.
|
|
|
Driver turn too slowly.
|
|
|
It is windy.
|
|
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It is raining.
|
4.
Starting in which year were newly manufactured trailers required to have ABS?
|
1972
|
|
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1987
|
|
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1998
|
|
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2004
|
5.
Failure to keep the fifth wheel plate properly greased could:
|
Cause the trailer to disconnect.
|
|
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Cause steering problems.
|
|
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Cause braking problems.
|
|
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Affect the lights.
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6.
Before a drive, ensure that air flows to all trailers by:
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Opening the rear shut-off valves and listening for escaping air.
|
|
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Closing the rear shut-off valves and listening for escaping air.
|
|
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Disconnecting air supply lines and listening for escaping air.
|
|
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Rolling each trailer down a hill and testing the brakes.
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7.
If oil and water build up in your vehicle's air tanks, the brakes:
|
May not work correctly.
|
|
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May feel squishy.
|
|
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Will squeal loudly when used.
|
|
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Will be extremely sensitive.
|
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