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Alaska CDL Permit Test - Combination

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.
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4 or fewer errors
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1.
When coupling, you should:
Make sure to couple the proper glad hands.
Only couple one set of glad hands.
It is best to leave one glad hand loose.
2.
If the emergency air line loses pressure:
The Anti-Lock Braking System will activate.
The service air line will activate.
The emergency brakes will activate.
3.
Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
4.
When coupling a trailer:
Make sure to couple the proper glad hands.
Glad hands can be connected to any other glad hands.
Only one set of glad hands should be connected.
5.
In an empty combination vehicle, the stiff suspension springs and strong brakes will have:
High traction.
Low traction.
No traction.
6.
Rearward amplification refers to:
The amount of noise projected to the rear of the vehicle.
The cause of the "crack-the-whip" effect.
The number of trailers that can be pulled by one tractor.
7.
What does an Anti-Lock Braking System (ABS) do?
It allows a vehicle's wheels to lock up.
It prevents a vehicle's wheels from locking up.
It makes turning a vehicle easier.
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