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Ask another driver.
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|
|
Use your mirrors to determine if the trailer has left the lane.
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|
|
Release the brake pedal and then push it down again.
|
|
|
Watch the jackknife warning light on the control panel.
|
Texas CDL Permit Test - Combination
(From the 2020 Texas 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 Texas Commercial Motor Vehicle Drivers Handbook. 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 easiest way to recognize that your trailer has begun to skid is to:
2.
Driving a combination vehicle ____ than driving a single vehicle.
|
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
|
3.
Which type of vehicle is most prone to the “crack-the-whip” effect?
|
A five-axle tractor semi-trailer
|
|
|
A three-axle tractor semi-trailer
|
|
|
A bobtail tractor
|
|
|
A triple trailer
|
4.
When coupling a trailer:
|
Make sure to couple matching glad hands.
|
|
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Any glad hand can be connected to any other glad hand.
|
|
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It is best to leave one glad hand unattached.
|
|
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Only one set of glad hands should be connected.
|
5.
The trailer hand valve:
|
Should always be used for parking.
|
|
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Should only be used for parking on a downhill.
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|
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Should never be used for parking.
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|
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Should only be used when transporting cargo.
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6.
Using the trailer hand valve while driving:
|
Will help you turn safely.
|
|
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Will stop your trailer safely.
|
|
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Can cause a skid.
|
|
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Is impossible.
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7.
An air supply control in its "emergency" position will:
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Turn on the air supply.
|
|
|
Apply the trailer emergency brakes.
|
|
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Prevent a skid.
|
|
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Accelerate the vehicle.
|
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