Free Oklahoma CDL Double/Triple Trailers Practice Test 2022

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 Oklahoma CDL Practice Test has the same questions as the real exam which is based on the Oklahoma 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 Oklahoma 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 2022 OK commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OK CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
What is a modulating control valve?
2.
When coupling, correct trailer height should:
3.
The air compressor governor stops air from pumping when it reaches the "cut-out" level or around generally _________.
4.
Automatic slack adjusters ________.
5.
How do air-operated disc brakes work?
6.
The service brake system ________.
7.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
8.
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?
9.
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
10.
Before you can supply air to the air tanks of a second trailer you need to:
11.
The tractor protection valve should pop out when air pressure falls to:
12.
Typically, air storage tanks hold enough air to allow the brakes to be used _______ even if the compressor stops working.
13.
If you have manual transmission _________.
14.
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
15.
When you make an emergency stop, you should _________.
16.
When performing the controlled braking method for an emergency stop, you are _________.
17.
Which of the following factors explains why the total stopping distance for air brakes is longer than that for hydraulic brakes?
18.
You can test whether the trailer air system is charged by:
19.
When uncoupling the rear trailer, which of these should be done first?
20.
A visual inspection after coupling should show that: