Free Idaho CDL Combination Vehicles Practice Test 2022

You have to pass the Idaho CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for good source material for your coming CDL test? You are in the right place. Our Idaho CDL 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. They cover topics ranging from combination vehicle maintenance to safely driving a complex rig. Each question is based on the official Idaho CDL manual so you can be sure that the information in our test is accurate and relevant to your examination. In addition, each CDL practice test 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 Idaho CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2022 ID commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ID CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
1.
The air lines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is _____, the service line is _________.
2.
The trailer air supply control knob is:
3.
The air leakage rate for a combination vehicle (engine off, brakes on) should not be more than _____ psi per minute.
4.
The iron trailer supports are up and the trailer is resting on the tractor. Make sure:
5.
After you supply air to the trailer, make sure the air lines are not crossed and the trailer brakes are working. This is done by:
6.
When uncoupling, make sure that the parking area:
7.
Compared to a straight truck or bus, there are ______ things to inspect in combination vehicles.
8.
If you have to enter another traffic lane to complete a wide turn, you should:
9.
When driving a combination vehicle with multiple trailers or dollies, all air shut-off valves except the last one at the back must be:
10.
A driver crosses the air lines when hooking up to an old trailer. What will happen?
11.
When you notice that your trailer has lost traction and is going into a skid, you should:
12.
Trailers will have an ABS malfunction lamp:
13.
When parking trailers without spring brakes, it is very important to:
14.
In normal driving, some drivers use the hand valve before the brake pedal to prevent a jack-knife. Which of the statements is true?
15.
Why should you be sure that the fifth wheel plate is greased as required?
16.
When uncoupling the trailer, after you shut off the trailer air supply and lock the trailer brakes, you should:
17.
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
18.
What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports?
19.
Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
20.
In case of landing gear failure while pulling out from under it, you should: