Free Maryland CDL Combination Vehicles Practice Test 2023

You have to pass the Maryland CDL combination vehicles endorsement to get ready for propelling your career with your license. You are looking for a good Maryland 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 Maryland CDL Manual 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 Maryland CDL Combination Vehicles Practice Test today and walk out with your endorsement!

Our CDL practice tests:
Based on 2021 MD commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MD CDL Combination Vehicles Test format:
20 questions
16 correct answers to pass
80% passing score
List of questions
A tractor with a _______ trailer, requires the most amount of stopping distance.
The likelihood of a fully loaded rig turning over compared to an empty trailer is:
After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?
Supplied by the service line from the tractor, each trailer or dolly has its own:
When you get ready to back under a semitrailer you should line up:
Rearward amplification is a major cause of:
You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You expect the trailer brakes to come on and:
Before coupling or uncoupling, the trailer wheels should always be:
A major leak in the trailer emergency line will cause:
Which of these statements is true?
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
Improperly greased or lubricated fifth wheels will cause:
When unlocking the fifth wheel in Step 6, all of the following apply except:
Crack-the-whip effect occurs when:
A fifth wheel in proper position for coupling will have:
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?
After you have coupled the trailer you should raise the landing gear by using:
To test the tractor protection valve, pump the brakes with the engine off until the trailer air supply knob pops out, usually at:
At the back of trailer used to tow other trailers are shut-off valves, also called:
While checking if the trailer is securely coupled to the tractor, the landing gears should be: