|
Should always be used for parking.
|
|
|
Should only be used for parking on a downhill.
|
|
|
Should never be used for parking.
|
|
|
Should only be used when transporting cargo.
|
Texas CDL Permit Test - Combination
(From the 2021 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 trailer hand valve:
2.
Using the trailer hand valve while driving:
|
Will help you turn safely.
|
|
|
Will stop your trailer safely.
|
|
|
Can cause a skid.
|
|
|
Is impossible.
|
3.
The easiest way to recognize that your trailer has begun to skid is to:
|
Ask another driver.
|
|
|
Use your mirrors to determine if the trailer has left the lane.
|
|
|
Release the brake pedal and then push it down again.
|
|
|
Watch the jackknife warning light on the control panel.
|
4.
Driving a combination vehicle ____ than driving a single vehicle.
|
Is easier
|
|
|
Requires more driving skill
|
|
|
Is better for training
|
|
|
Is safer in inclement weather
|
5.
An air supply control in its "emergency" position will:
|
Turn on the air supply.
|
|
|
Apply the trailer emergency brakes.
|
|
|
Prevent a skid.
|
|
|
Accelerate the vehicle.
|
6.
When coupling a trailer:
|
Make sure to couple matching glad hands.
|
|
|
Any glad hand can be connected to any other glad hand.
|
|
|
It is best to leave one glad hand unattached.
|
|
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Only one set of glad hands should be connected.
|
7.
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
|
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