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Free Maryland CDL Combination Practice Test 2025
Part of mandatory Entry-Level Driver Training Course Based on 2025 MD commercial driver's license manualAvailable in EN, ES
25questions
5mistakes allowed
80%passing score
Here are some economic opportunities for truckers in the great state of Maryland. Maryland benefits from federal government services and defense contracting because of its proximity to Washington, DC. The state is also a player in logistics. The Port of Baltimore is one of the largest ports in the country, creating a demand for truck drivers skilled in intermodal transport. Companies like Amazon have established major logistics hubs in the state, which is also near other major Eastern cities like Philadelphia and New York City. All this creates a demand for truckers to transport goods along the Eastern Seaboard. Other sectors with opportunities for truckers include commercial fishing, agriculture (mainly dairy farming), and biotechnology.
Major trucking routes in Maryland include Interstates 68, 70, 83, 95, and 495 (the Capital Beltway) and U.S. Routes 40 and 50.
To become a commercial driver, you must obtain a Commercial Driver’s License (CDL).
There are three classes of CDLs, each designed for different types of commercial vehicles: Class A, Class B, and Class C. If you want to drive heavy combination vehicles like semi-trucks or tractor-trailers, you should go for a Class A CDL.
To obtain a CDL of any class, you must pass a medical examination, an official General Knowledge test on commercial driving theory, and a skills test on operating a commercial vehicle. But to drive combination vehicles, you must also pass an official Combination Vehicles knowledge test on the theory of operating combination vehicles.
The official Maryland Commercial Driver License Manual (Maryland CDL Handbook 2025) contains all the information that is covered by the Combination Vehicles knowledge test. However, it’s designed as a reference work, not as a tutorial or textbook. You should read it, but you should also supplement your reading with better study tools.
This free Maryland CDL Combination practice test is up to date as of January, 2025. It is designed to resemble the official written knowledge test in both content and structure. The 25 practice questions and answers on this test address such topics as combination braking systems, combination driving techniques, coupling and uncoupling, and vehicle inspections. Unlike the official test, however, the practice test isn’t timed, and each question has both an available hint to gently lead you to the correct answer and an explanation of the correct answer. Once you’ve scored well enough on these practice tests, you can consider yourself ready to take the official knowledge test.
Perfect for
- First-time MD CDL and CLP applicants
- CDL holders adding endorsements
- MD CDL renewal applicants
What to expect on the actual exam
| How many questions | 20 |
|---|---|
| How many correct answers to pass | 16 |
| Passing score | 80% |
Unlock all 1,500+ exam-like questions for Maryland. Pass Guarantee
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List of questions (classic view)
- After you lock the kingpin into the fifth wheel, how should you check the connection?
- After you connect the air lines but before you back under the trailer, you should
- Which statement best illustrates the "crack-the-whip" effect?
- When you inspect the landing gear after uncoupling the trailer, where should the tractor be?
- What is the safest way to turn right from a two-way road?
- To drive a triple combination vehicle, you must have
- To prevent a rollover, cargo should be
- Combination vehicles take longer to stop when they are empty than when they are fully loaded, because
- If your vehicle gets stuck on a railroad track, you should
- Low-slung vehicles can be risky at railroad crossings because
- On a double or triple vehicle, which wheels offtrack the most?
- When you're pulling doubles or triples, the shut-off valves should always be
- On a trailer, where is the yellow antilock brake (ABS) malfunction lamp located?
- Even before antilock braking systems (ABS) were required, some vehicles already had them. How can you check if your vehicle has ABS?
- An antilock braking system (ABS) is useful
- After coupling, make sure that the air lines are not crossed. How should you do this?
- During uncoupling, you should disconnect the electrical cable and
- Before you start to uncouple, you must
- You can confirm that air is going to all brakes in your trailers by
- To uncouple a loaded trailer, after the landing gear has made firm contact with the ground, you should
- If the trailer has antilock brakes (ABS) but the tractor doesn't,
- To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and
- If your test of the tractor protection valve is successful,
- The tractor protection valve is designed to close automatically if the air pressure falls into the pressure range specified by the manufacturer, typically
- As part of your vehicle inspection test, if your vehicle is equipped with air brakes and has a trailer, you will inspect the air connections between the truck or tractor and the trailer. Make sure that the ________ are locked in place and free of damage or air leaks.
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