Free Missouri CDL Double/Triple Trailers Practice Test 2022

Do you know how to pair double or triple trailers? If you are planning to take the Missouri CDL double/triple trailer endorsement test, make sure to know it! Our Missouri CDL Practice Test has the same questions as the real exam which is based on the Missouri CDL Book. 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 Missouri 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 MO commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MO CDL Double/Triple Trailers Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
What is the purpose of a modulating control valve?
2.
The part of the combination vehicle most likely to turn over is the:
3.
Which is true when checking air flow to all trailers?
4.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
5.
The most efficient way to drive down a long grade is to ________.
6.
Air brakes take longer to stop than hydraulic brakes because _______.
7.
Which of these statements about the handling of doubles and triples is true?
8.
When uncoupling twin trailers you should park:
9.
The trailer air supply control should pop out when the air pressure falls into the pressure range of:
10.
How should the air leakage rate be tested?
11.
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
12.
During a normal drive, the spring brakes are held back by _____.
13.
The tractor protection valve should pop out when air pressure falls to:
14.
What does the air compressor governor control?
15.
It's important that a warning signal comes on before the air pressure in the tank falls below _______.
16.
Why do some air brake systems have an alcohol evaporator?
17.
When performing the controlled braking method for an emergency stop, you are _________.
18.
Water and oil _______.
19.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
20.
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 _________.