Idaho CDL Combination Test 1

Question 1

When backing a trailer, you must turn the steering wheel:

In the direction you want the trailer to move. In the direction opposite of where you want the trailer to move. To the left until backing is complete.

Correct Answer:

In the direction opposite of where you want the trailer to move.

Question 2

Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally. The trailer will not have brakes. The trailer will speed up.

Correct Answer:

The trailer will not have brakes.

Question 3

After completing a pre-trip inspection, you should ensure that the:

Service line valve is closed. Trailer hand brake is applied. Emergency line valve is open.

Correct Answer:

Service line valve is closed.

Question 4

If you are backing and the trailer begins to drift off-course, the driver should:

Return the steering wheel to the 12 o’clock position. Turn the top of the steering wheel in the direction of the drift. Turn the top of the steering wheel in the direction opposite of the drift.

Correct Answer:

Turn the top of the steering wheel in the direction of the drift.

Question 5

The trailer hand valve should be used:

To test the trailer brakes. To check the connection between the trailer and tractor. To accelerate.

Correct Answer:

To test the trailer brakes.

Question 1 of 20

Exam overview

About this Exam

Prepare with the Idaho CDL Combination Test 1 practice quiz. This question bank includes 20 questions covering trailer, tractor, backing, valve, and combination. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Idaho CDL Combination Test 1

This practice set contains 20 questions from the matching question bank and focuses on trailer, tractor, backing, valve, and combination. 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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Idaho CDL Combination Test 1

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