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 the purpose of a front-brake limiting valve?
2.
The braking power of the spring brakes ______.
3.
Brake drums should not have cracks longer than what length?
4.
If the dolly has spring brakes, release them with:
5.
How do you check the low pressure warning signal?
6.
When driving doubles or triples in adverse or slippery weather conditions, all of the following are true except:
7.
Automatic air tanks _______.
8.
A safety valve that releases air _______.
9.
Letting up on the brake pedal _______.
10.
If the air compressor has its own oil supply you should do what before driving?
11.
What distinguishes a wedge brake from other types of brakes?
12.
A danger of a malfunctioning tractor protection valve is:
13.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
14.
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
15.
Which of the following is the most common reason brakes fade?
16.
To apply the parking brakes, you should _______.
17.
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
18.
The last step to uncouple a converter dolly is:
19.
Drivers of doubles and triples must take into greater account:
20.
A converter dolly is used: