Combination
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 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 25 multiple-choice questions, and applicants will need to correctly answer a minimum of 20 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
Number of Questions
25
Passing Score
20
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To Pass
0
Correct
0
Incorrect
0
2. When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
Sound your horn.
Let other drivers wave you into their lane.
Expect other drivers to make room for your vehicle.
Make sure there is a large enough gap for your vehicle.
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3. The emergency air line:
Prevents skids.
Supplies air to the trailer air tanks.
Is controlled by the foot brake.
Is connected to the relay valves.
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5. What is off-tracking?
When a vehicle’s front wheels follow a different path than its rear wheels
When a vehicle's wheels run over a curb during a turn
When a vehicle's wheels all follow the exact same path
When a load shifts during a turn
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6. The trailer hand valve should be used:
To accelerate.
To check the connection between the trailer and tractor.
To test the trailer brakes.
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7. Which type of vehicle is most prone to the “crack-the-whip” effect?
A five-axle tractor semi-trailer
A triple trailer
A three-axle tractor semi-trailer
A bobtail tractor
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