|
Keeps air in a brake system if there is a bad leak.
|
|
|
Prevents a truck from being stolen.
|
|
|
Prevents a trailer from being accidentally released.
|
Alaska CDL Permit Test - Combination
(From the 2021 Alaska 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 Alaska 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.
A tractor protection valve:
2.
The service air line is often controlled by the foot brake and is attached to the ____ valves.
|
Relay
|
|
|
Supply
|
|
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Emergency
|
3.
Before beginning a trip, you should:
|
Leave the service line valve open.
|
|
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Remove the relay valves.
|
|
|
Close the emergency line valve.
|
4.
Maintain a following distance of at least ____ for every 10 feet of your vehicle if you are traveling at a speed under 40 mph.
|
One second
|
|
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Two seconds
|
|
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Three seconds
|
5.
Which of the following will not help prevent a rig from rolling over?
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Keeping the cargo as close to the ground as possible
|
|
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Driving slowly around turns
|
|
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Driving on the shoulder of a road
|
6.
If the emergency air line loses pressure:
|
The Anti-Lock Braking System will activate.
|
|
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The service air line will activate.
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|
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The emergency brakes will activate.
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7.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:
|
In the same way as they would be in a vehicle without ABS.
|
|
|
As the vehicle is placed in neutral.
|
|
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With the hand brake.
|
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