Home > CDL - Commercial Driver's License Exam > Quizzes > Commercial Driver’s License (CDL) Exam Endorsement Test: The Doubles/Triples Test
Commercial Driver’s License (CDL) Exam Endorsement Test: The Doubles/Triples Test
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 0% • Most missed: “When you are pulling trailers, which of the following statements is true about s…”
Commercial Driver’s License (CDL) Exam Endorsement Test: The Doubles/Triples Test
Time left 00:00
25 Questions

1. Converter dollies often do not have
2. In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi.
3. When coupling twin trailers, a converter dolly is
4. It is important to check the height of the trailer before connecting a converter dolly to a trailer. The trailer is at the correct height when
5. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel.
6. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal.
7. When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer.
8. Trucks with trailers have a dangerous “crack-the-whip” effect. Because of this, which of the following vehicle parts is most likely to tip over
9. The pintle hook plays a part in
10. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly
11. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer.
12. When you are pulling trailers, which of the following statements is true about steering
13. When checking the coupling system, make sure that the locking jaws are around the shank of the
14. Trucks that are empty or lightly loaded
15. You are driving with more than one trailer. Which trailer should come first behind the tractor
16. You are driving a tractor with multiple trailers. Which of the following statements about offtracking is true
17. In order to supply air to the air tanks of a second trailer, you must ______ shut-off valves at the rear of the first trailer and ________ the shut-off valves at the rear of the second trailer.
18. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position.
19. Which of the following is true about loading cargo into double or triple trailers
20. Which of the following must be connected when coupling tractor to trailer or trailer to trailer
21. You are driving a triple trailer and there is a loss of air pressure in the emergency line. Which of the following will occur
22. What is one function of the tractor protection valve
23. When driving a double or triple trailer, greater care must be given to
24. During a jackknife, it is best to
25. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Which diagram shows the best way to turn
e9780738667058_i0084.jpg

⚡ Recently practiced quizzes in this topic
Live quiz activity
Commercial Driver’s License (CDL) Exam Endorsement Test: The Combination Vehicles Test Commercial Driver’s License (CDL) Exam General Knowledge Test Commercial Driver’s License (CDL) Exam Endorsement Test: The Passenger Transport Test Commercial Driver’s License (CDL) Exam Endorsement Test: The Tanker Test Commercial Driver’s License (CDL) Exam Endorsement Test: The Metal Coil Test
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.