Free Missouri CDL Combination Vehicles Practice Test 2022

You have to pass the Missouri CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Missouri CDL Practice Test source for your coming CDL test? You are in the right place. Our practice test is a great resource for beginners. The test is designed for you to have exactly the experience of the exam as you will be more familiar with both the test format and the subject. Our CDL practice test covers topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official Missouri CDL Book so you can be sure that the information in our test is accurate and relevant to your examination. In addition, each question has a detailed explanation so that it is very useful for you to learn from your mistakes. Preparing well before test day with questions and content that we cover. Start with our Free Missouri CDL Combination Vehicles Practice Test today and walk out with your endorsement!

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 Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
When you open the emergency shut-off valve at the back of the last trailer after supplying air to trailer(s):
2.
For proper hose coupling, lines are often color-coded. Service lines are usually:
3.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
4.
The shut-off valves at the back of the last trailer should be:
5.
When traveling under 40 mph, how much distance should you leave, at minimum, from the car in front of you?
6.
To prevent water and dirt from entering the air system, hose couplers can be attached to dummy couplers or:
7.
After you lock the kingpin into the fifth wheel, you should check the connection by:
8.
When you get ready to back under a semitrailer you should line up:
9.
If the service line comes apart while you are driving a combination vehicle, but the emergency line stays together, what will happen right away?
10.
When backing under the trailer, air lines:
11.
The tractor should be positioned to back under the trailer:
12.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
13.
The emergency air line is usually what color?
14.
You are coupling a tractor to a semitrailer and have backed up, but are not under it. What should you hook up before backing under?
15.
Why should you be sure that the fifth wheel plate is greased as required?
16.
After you have coupled the trailer you should raise the landing gear by using:
17.
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
18.
At the back of trailer used to tow other trailers are shut-off valves, also called:
19.
The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:
20.
Before getting out to inspect the coupling, secure the vehicle by putting transmission in neutral, shutting off engine and taking the key with you, and: