Free Pennsylvania CDL Double/Triple Trailers Practice Test 2023

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 2021 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
What is the purpose of an antilock braking system (ABS)?
If air supply drops when driving, the tractor protection valve ________.
You will test that the trailer service brakes are working by:
On large buses low pressure warning devices usually signal at ______.
After coupling, the air shut-off valves at the back of the first trailer should be:
The braking power of the spring brakes ______.
How often should alcohol containers be checked during cold weather?
You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
Air tanks need to be drained ______.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?
Automatic air tanks _______.
When the safety valve releases air this indicates ___________.
Which of the following is the most common reason brakes fade?
What is a front brake limiting valve?
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
When inspecting doubles and triples shut-off valves, which of the following is true?
You can test whether the trailer air system is charged by:
A converter dolly is used: