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Free Delaware CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Delaware CDL double/triple trailer endorsement test, make sure to know it! Our Delaware CDL Practice test has the same questions as the real exam which is based on the Delaware CDL manual. It covers most of the subject areas on the Double/Triple Trailers Test such as pulling double and triple trailers, the risk of rollover, managing space, and special considerations when hauling multiple trailers. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, you can take this CDL practice test an unlimited number of times to make sure you learn all the questions. Let’s try our Free Delaware CDL Double/Triple Trailers Practice Test today and pass your CDL endorsement exam! Good luck and keep driving safely!

Our CDL practice tests:
Based on 2021 DE commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DE CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
Study now
List of questions
1.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
2.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
3.
You are driving a 100-foot truck with double trailers at 30 mph. The road is dry, and visibility is good. You should keep at least ______ seconds of space ahead of you.
4.
The braking power of the spring brakes ______.
5.
After coupling, the air shut-off valves at the back of the first trailer should be:
6.
When uncoupling twin trailers you should park:
7.
Brake drums should not have cracks longer than what length?
8.
Which of these statements about quick steering movements and doubles/triples is true?
9.
Air tanks need to be drained ______.
10.
How should the air leakage rate be tested?
11.
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
12.
Where is compressed air stored?
13.
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
14.
When checking that air is flowing to all trailers, what is used to provide air to the supply lines?
15.
Why should air tanks be drained completely?
16.
What does the air compressor governor control?
17.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
18.
In dual-air systems the pressure should build to _______.
19.
Why should you drain water from compressed air tanks?
20.
Vehicles with air brakes have pressure gauges connected to the _______.
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