Crist CDL free online BVM practice tests

FREE 2024 Delaware (DE) Combination Quick Review 3

2024 DE Combination Information

The combination endorsement allows you to drive a commercial motor vehicle (CMV) with a trailer attached. The combination endorsement is required for a Class A CDL and allows only one trailer to be attached to the power unit. If you are looking to pull more than one trailer you will also need to take the doubles - triples endorsement.

The combination exam is comprised of 20 multiple choice questions covering the additional skills needed to operate a combination vehicle, which are usually heavier, longer, and require extra skill. You will need to score at least 80% (16 out of 20) to pass the combination exam.

We have 100 questions that you are likely to find on the combination endorsement exam. These questions follow the 2024 Delaware CDL drivers’ manual guidelines, they will help you add the combination endorsement to your CDL, and will provide immediate feedback with explanations to help you retain the information. Get started today and put yourself in the driver’s seat.

Image of Delaware's Driver's License

Based on the 2024 DE CDL Driver's Manual

DE Combination Fact Sheet
Questions on Test:
20
Correct answers needed to pass:
16
Passing Score:
80%
Age to apply:
18
Advertise Here! - Advertisement
Advertise Here! - Advertisement
Advertise Here! - Advertisement
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than ____ PSI per minute.

Possible Answers:

2
3
4
Answer:
4
Explanation:
With a fully-charged air system, turn off the engine, release the parking brake; and time the air pressure drop. The loss rate should be less than three psi in one minute for combination vehicles, adding one second if the brakes are applied.
Rate This Test:
** Ads keep our website Free.
Advertise Here! - Advertisement
  1. The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than ____ PSI per minute.
  2. Why should you lock the tractor glad hands to each other or to the storage bracket when you are not towing a trailer?
  3. You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You would expect the trailer brakes to come on and:
  4. The hand valve should be used:
  5. Combination vehicles take longer to stop when they are empty than when they are fully loaded, because
  6. To uncouple a loaded trailer, after the landing gear has made firm contact with the ground, you should
  7. The tractor protection valve is designed to close automatically when the air pressure falls into the pressure range specified by the manufacturer, typically
  8. If the brakes did not release when you pushed the trailer air supply valve, you should
  9. In general, the higher your truck's center of gravity, the
  10. When you test the tractor protection valve, the red air supply control knob should go into the ________ position.
  11. When coupling, the proper position of the fifth wheel is
  12. The front trailer supports are up, and the trailer is resting on the tractor, make sure:
  13. You are coupling a tractor to a semi-trailer and have backed up but are not under it. What should you hook up before backing under?
  14. Before you back under a trailer, make sure the:
  15. On a double or triple vehicle, which wheels off-track the most?
  16. Which statement best illustrates the "crack-the-whip" effect?
  17. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and
  18. Which of these vehicles off-tracks the most?
  19. Almost half of all truck driver deaths are the result of
  20. At night, when a vehicle is carrying a load that extends four feet or more beyond the rear of the body, there must be _______ at the extreme end of the load.
CristCDL.com on Google Play
CristCDL.com on Apple Store
CristCDL.com is a privately owned website, and is not affiliated with any government agencies.
Copyright © 1999 to 2024 CristCDL.com. All rights reserved.