Free Idaho CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the Idaho CDL double/triple trailer endorsement test, make sure to know it! Our Idaho CDL practice test has the same questions as the real exam which is based on the Idaho 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 Idaho 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 ID commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ID CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
What is the "cut-in" pressure for most air compressor governors?
What is a modulating control valve?
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
If air supply drops when driving, the tractor protection valve ________.
You will test that the trailer service brakes are working by:
After coupling, the air shut-off valves at the back of the first trailer should be:
At 55 mph on dry pavement, the air brake lag distance is how many feet?
You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur?
If the dolly has spring brakes, release them with:
During normal operation, the brakes of the double/triple trailer are controlled by:
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
If you want to couple a second trailer to your combination vehicle, secure it by using:
Typically, air storage tanks hold enough air to allow the brakes to be used _______ even if the compressor stops working.
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
Why should the air hoses connected to the brake chambers be checked?
Water and oil _______.
Why should you drain water from compressed air tanks?
Why is it so crucial to drain your vehicle's air tanks at the end of each day of driving?
When inspecting doubles and triples shut-off valves, which of the following is true?
A converter dolly is used: