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Utah CDL Practice Test: Double and Triples - Test 4 2020

(From the 2020 Utah CDL Handbook)
Number of tests: 27
Number of questions: 30
Passing score: 80

Directions: To obtain this endorsement for pulling two or three trailers, applicants must pass a 15-question test. And to pass the test, applicants must score at least 80%. Test questions are from the Utah Commercial Driver Handbook. The Double/Triple trailers endorsement can be used with the Class A CDL. If you need additional information, please contact your local DMV office. You can find your nearest DMV office at Utah DMV locations.

You have made error(s) so far.
Your Challenge Library: 0

1. Stop light switches are necessary because ________.

2. Dollies that have antilock brakes will have what color lamps on the left side of the dolly?

3. When the air system is low ________.

4. Coupling devices that connect the emergency and service air lines from the truck to the trailer are _______.

5. Why should you hang the electrical cable with the plug down when uncoupling?

6. If you must stop on a one-way highway, you should place devices _____ ft. toward the approaching traffic.

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