Free Pennsylvania 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 Pennsylvania CDL Practice Test has the same questions as the real exam which is based on the PA 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 Pennsylvania 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 PA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
PA 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 modulating control valve?
2.
Automatic slack adjusters ________.
3.
The converter dolly air tank drain valve on coupled double/triple trailers should be:
4.
In terms of stability, doubles and triples are:
5.
Air brakes take longer to stop than hydraulic brakes because _______.
6.
The air compressor should pump air starting at what psi?
7.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
8.
During normal operation, the brakes of the double/triple trailer are controlled by:
9.
How should the air leakage rate be tested?
10.
Why should you check the brake adjustment often?
11.
If your vehicle is not equipped with ABS, when you brake hard on a slippery surface what may occur?
12.
Why does a heavily-loaded vehicle take longer to stop than a lightly-loaded vehicle?
13.
When checking that air is flowing to all trailers,what is used to provide air to the supply lines?
14.
When testing the trailer emergency brakes, charge the system, pull out the trailer air supply control, and:
15.
If you have manual transmission _________.
16.
What does the air compressor governor control?
17.
Why do some air brake systems have an alcohol evaporator?
18.
To position the converter dolly over short distances you can:
19.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
20.
Why should you not drive your vehicle if the air pressure does not build up quickly enough?