Question 1
Place the trailer air supply control in its "emergency" position to test:
Correct Answer:
The trailer emergency brakes.
Question 2
How much space should be between the upper and lower fifth wheel?
Correct Answer:
No space
Question 3
If a trailer begins to skid, it is best for the driver to:
Correct Answer:
Release the brakes.
Question 4
To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:
Correct Answer:
Check for wheel speed sensors coming from the back of the brakes.
Question 5
Shut-off valves:
Correct Answer:
Prevent air from escaping air brake systems.
Question 1 of 20
Exam overview

About this Exam

Prepare with the Maine CDL Combination Test 1 practice quiz. This question bank includes 20 questions covering trailer, vehicle, driver, while, and control. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Maine CDL Combination Test 1

This practice set contains 20 questions from the matching question bank and focuses on trailer, vehicle, driver, while, and control. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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