- Updated for January 2025
- Based on 2025 CT commercial driver's license manual
Free Connecticut CDL Combination Practice Test 2025
We bet we know why you’re here: You need to pass the official Combination Vehicles knowledge test on the theory of operating combination vehicles. You’ve been studying the official Connecticut Commercial Driver License Manual (Connecticut CDL Handbook 2025), especially Chapter 6 (Combination Vehicles), because you know the knowledge test is based on it. But after you looked at this official study guide, you felt you could use some more help to be sure of passing the knowledge test. Great! That’s just what we do. We’ve helped thousands of aspiring drivers pass their knowledge tests, and we can help you too.
This free Connecticut CDL Combination practice test is also based on the official manual and is up to date as of January, 2025. Practicing with it will reinforce your knowledge and identify topics you need to study further. Each of the 25 practice questions comes with a helpful hint and an explanation of the correct answer. The practice questions and answers on this test will assess your knowledge of such topics as safe driving techniques, combination braking systems, and coupling and uncoupling. We have other Combination practice tests too. Keep practicing with them until you’re ready to take the official Combination Vehicles knowledge test.
Be advised that virtually all large semi-trucks and tractor-trailers are equipped with air brakes. Your Commercial Driver’s License (CDL) will prohibit you from operating vehicles equipped with air brakes until you pass the official Air Brakes knowledge test. Don’t worry; we have a number of Air Brakes practice tests you can use to prepare for that knowledge test as well.
With your Class A CDL in hand, you should be able to find plenty of work in Connecticut as a semi-truck driver. The agricultural sector depends on truckers to transport its products. Manufacturing, largely in defense and aerospace, is the state’s third-largest economic sector after finance, insurance, and real estate. These high-tech firms depend on truckers to deliver equipment and materials to them as well as transport their products.
The most important trucking route in Connecticut is Interstate 95, which runs along the coast between New York City and Rhode Island but is notorious for traffic jams during rush hours. Other important commercial routes include Interstate 84, which connects Hartford with Massachusetts and New York State; and Interstate 91, which connects New Haven to Hartford, continues into Massachusetts and Vermont, and then continues into Quebec as Autoroute 55.
- Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements
- Triple-checked for accuracy
What you need to know
What to expect on the actual CT DMV exam
questions
correct answers to pass
passing score
Helpful links
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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