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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Alaska CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Alaska CDL Manual. Take this practice test now to prepare for the actual AK CDL combination test!
1. Which of the following is NOT part of testing the trailer service brakes?
Releasing the parking brakes.
Pushing in the trailer air supply knob.
Moving the vehicle forward slowly.
2. Which of the following is NOT part of a trailer air line system?
Glad hands
Emergency air-line
3. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.
20 miles
25 miles
50 miles
4. As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
a mechanical vibration.
the service line valve close.
air escaping from the open valve.
5. Empty trucks:
require a shorter stoppingĀ distance than full trucks.
require a greaterĀ stopping distance than full trucks.
require the same stoppingĀ distance than full trucks.
6. To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
1 second; 5 feet
1 second; 10 feet
2 seconds; 10 feet
7. To test the tractor-semitrailer connection for security:
pull out the air supply knob.
check that the trailer is locked onto the tractor by pulling the tractor gently forward while the trailer brakes are still locked.
plug the electrical cord into the trailer and fasten the safety catch.
8. After coupling the trailer, begin raising the landing gear by using:
the crank handle.
the low gear range.
the high gear range.
9. Broken suspension parts can be very dangerous. When inspecting your vehicle for suspension system defects, look for:
Spring hangers that allow movement of axle from proper position.
Broken leaves in a multi-leaf spring.
All of the above.
10. If you have convex mirrors, be aware that:
in a convex mirror objects appears larger than they really are.
everything appears smaller in a convex mirror than it would if you were looking at it directly.
objects seem closer than they really are.
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AK CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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