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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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Georgia CDL Permit Test - Combination
(From the 2021 Georgia 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.
Before a drive, ensure that air flows to all trailers by:
2.
What is another name for the service line?
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Control line
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Exchange line
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Surplus line
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Parallel line
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3.
An Anti-Lock Braking System (ABS):
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Allows wheels to lock up.
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Prevents wheels from locking up.
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Makes it easier to turn a large vehicle.
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Assists with the operation of brake lights.
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4.
Rollovers happen when:
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A truck driver is driving too fast.
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The driver of a vehicle in front of a truck is moving to slowly.
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A truck driver is driving too slowly.
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ABS is working effectively.
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5.
Having ABS on only one axle:
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Does not change braking in any way.
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Is not possible.
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Will allow the driver additional control over their vehicle when braking.
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Will cause extra strain on the other axles.
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6.
The trailer hand valve:
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Should always be used for parking.
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Should only be used for parking on a downhill.
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Should never be used for parking.
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Should only be used when transporting cargo.
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7.
When connecting a converter dolly to a second or third trailer, the trailer height should be:
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Slightly higher than the center of the fifth wheel.
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Level with the center of the fifth wheel.
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Slightly lower than the center of the fifth wheel.
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Next to the center of the fifth wheel.
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