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A tractor without a trailer
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A tractor attached to two trailers
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A tractor with a tank
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Connecticut CDL Permit Test - Combination
(From the 2020 Connecticut 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 Connecticut 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.
What is a bobtail tractor?
2.
A shut-off valve:
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Is located on the front of a trailer.
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Is located on the instrument panel.
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Prevents air from escaping an air brake system.
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Should always be open.
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3.
When glad hands are coupled, the seals should be pressed together at an angle of:
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30 degrees.
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45 degrees.
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60 degrees.
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90 degrees.
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4.
What happens when the wheels of a trailer lock up?
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The trailer will often continue to move in a straight line.
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The trailer may disengage.
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The trailer may swing around.
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Steering will become easier.
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5.
The easiest way to recognize that your trailer has begun to skid is to:
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Ask another driver.
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Use your mirrors to determine if the trailer has left the lane.
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Release the brake pedal and then push it down again.
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Watch the jackknife warning light on the control panel.
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6.
A tractor protection valve is:
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A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
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A device that prevents theft.
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A device that controls fuel levels.
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A device that allows the battery to recharge efficiently.
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7.
When you are pulling a trailer, the air supply control lever should be in its ____ position.
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Emergency
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Supply
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Normal
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