Free New Hampshire CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the New Hampshire CDL double/triple trailer endorsement test, make sure to know it! Our NH CDL Practice Test has the same questions as the real exam which is based on the NH 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 Hampshire 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 NH commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NH 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?
To test the tractor protection valve, the engine needs to be:
When coupling, correct trailer height should:
When you turn with the tractor/triple trailer combination, the wheels that off-track (cheat) the most are:
After coupling, the air shut-off valves at the back of the first trailer should be:
You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
When coupling or uncoupling, trailer or dolly wheel should always be:
Which of these statements about the handling of doubles and triples is true?
Automatic air tanks _______.
During a normal drive, the spring brakes are held back by _____.
An air compressor can be cooled by _______.
Why should you check the brake adjustment often?
When increased application pressure to maintain the same speed becomes necessary, you should ______.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
What does the air compressor governor control?
Why do some air brake systems have an alcohol evaporator?
Water and oil _______.
In dual-air systems the pressure should build to _______.
Where are the brake drums located?
Why should you not drive your vehicle if the air pressure does not build up quickly enough?