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Connecticut 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 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.
You have made error so far
Passing grade —
4 or fewer errors
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1.
The easiest way to recognize that your trailer has begun to skid is to:
Ask another driver.
Use your mirrors to determine if the trailer has left the lane.
Release the brake pedal and then push it down again.
Watch the jackknife warning light on the control panel.
2.
What happens when the wheels of a trailer lock up?
The trailer will often continue to move in a straight line.
The trailer may disengage.
The trailer may swing around.
Steering will become easier.
3.
When glad hands are coupled, the seals should be pressed together at an angle of:
30 degrees.
45 degrees.
60 degrees.
90 degrees.
4.
When you are pulling a trailer, the air supply control lever should be in its ____ position.
Emergency
Supply
Normal
5.
A shut-off valve:
Is located on the front of a trailer.
Is located on the instrument panel.
Prevents air from escaping an air brake system.
Should always be open.
6.
A tractor protection valve is:
A device that keeps air in the tractor or truck brake system, should the trailer break away or develop a bad leak.
A device that prevents theft.
A device that controls fuel levels.
A device that allows the battery to recharge efficiently.
7.
What is a bobtail tractor?
A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank
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