Free North Dakota CDL Double/Triple Trailers Practice Test 2023

Do you know how to pair double or triple trailers? If you are planning to take the North Dakota CDL double/triple trailer endorsement test, make sure to know it! Our ND CDL Practice Test has the same questions as the real exam which is based on the North Dakota 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 North Dakota 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 ND commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ND 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?
When driving a truck with more than one trailer, which trailer should be first behind the truck?
How can you be sure you supplied air to a second trailer?
When connecting converter dolly to the front trailer, support gear should be:
The increased likelihood of doubles and triples turning over is called:
At 55 mph on dry pavement, the air brake lag distance is how many feet?
Brake drums should not have cracks longer than what length?
A front brake limiting valve ______.
The service brake system ________.
How do you check the low pressure warning signal?
Why should you check the brake adjustment often?
The tractor protection valve should pop out when air pressure falls to:
When the safety valve releases air this indicates ___________.
Where is compressed air stored?
When increased application pressure to maintain the same speed becomes necessary, you should ______.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
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 _________.
What affects the stopping distance for air brakes?
Vehicles with air brakes have pressure gauges connected to the _______.
The pintle hook should never be unlocked when: