Free District of Columbia CDL Double/Triple Trailers Practice Test 2022

Do you know how to pair double or triple trailers? If you are planning to take the CDL double/triple trailer endorsement test, make sure to know it! Our CDL practice test has the same questions as the real exam which is based on the DC CDL Manual. They cover 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 District of Columbia 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 2022 DC commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
DC CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
2.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
3.
When coupling, correct trailer height should:
4.
The most efficient way to drive down a long grade is to ________.
5.
On older vehicles, a low air pressure warning signal comes on at what psi?
6.
The increased likelihood of doubles and triples turning over is called:
7.
Air tanks need to be drained ______.
8.
How should the air leakage rate be tested?
9.
An air compressor can be cooled by _______.
10.
When driving doubles or triples, for safer handling which trailer should be at the rear?
11.
If your vehicle is not equipped with ABS, when you brake hard on a slippery surface what may occur?
12.
Where is compressed air stored?
13.
Wedge brakes and disc brakes are ______ than s-cam brakes.
14.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
15.
If you have manual transmission _________.
16.
If the air compressor does not have its own oil supply, how is it lubricated?
17.
Why should the air hoses connected to the brake chambers be checked?
18.
Why should you drain water from compressed air tanks?
19.
You can test whether the trailer air system is charged by:
20.
When uncoupling the rear trailer, which of these should be done first?