Free New Jersey 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 CDL Practice Test NJ has the same questions as the real exam which is based on the NJ 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 New Jersey 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 NJ commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NJ CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
What is the purpose of a modulating control valve?
What is the "cut-in" pressure for most air compressor governors?
If air supply drops when driving, the tractor protection valve ________.
How do air-operated disc brakes work?
After coupling, the air shut-off valves at the back of the first trailer should be:
The braking power of the spring brakes ______.
When coupling or uncoupling, trailer or dolly wheel should always be:
On older vehicles, a low air pressure warning signal comes on at what psi?
Which of these statements about the handling of doubles and triples is true?
When uncoupling twin trailers you should park:
At 55 mph on dry pavement, the air brake lag distance is how many feet?
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
When inspecting the shut-off valves on doubles and triples, all of the following is true except:
Why should you check the brake adjustment often?
Why does a heavily-loaded vehicle take longer to stop than a lightly-loaded vehicle?
Where is compressed air stored?
If you have manual transmission _________.
To apply the parking brakes, you should _______.
You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _________.
To position the converter dolly over short distances you can: