|
In the same way as they would be in a vehicle without ABS.
|
|
|
As the vehicle is placed in neutral.
|
|
|
With the hand brake.
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Oregon CDL Permit Test - Combination
(From the 2021 Oregon 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 Oregon Commercial Driver 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.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:
2.
Simply changing lanes can cause:
|
A “crack-the-whip” effect, resulting in a rollover.
|
|
|
A trailer to straighten out.
|
|
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Confusion over which lane the driver is hoping to use.
|
|
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Other drivers to reduce their speed.
|
3.
More than half of all accident-related truck driver deaths are caused by:
|
Rollovers.
|
|
|
Slippery roads.
|
|
|
Other drivers.
|
4.
In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
|
20 and 45 psi.
|
|
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75 and 105 psi.
|
|
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50 and 65 psi.
|
5.
Fully-loaded rigs:
|
Are less likely to roll over than empty rigs.
|
|
|
Are more likely to roll over than empty rigs.
|
|
|
Are just as likely to roll over as empty rigs.
|
|
|
Should not be driven.
|
6.
When backing a trailer, you must turn the steering wheel:
|
In the direction you want the trailer to move.
|
|
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In the direction opposite of where you want the trailer to move.
|
|
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To the left until backing is complete.
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7.
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.
|
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