Combination Vehicles Practice Test | Connecticut 2025 #2

Train for FREE online with our Connecticut CDL combination vehicle test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a CT combination license in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a combination license may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . How much space should be between the upper and lower fifth wheel?

About five inches of space

A maximum of two inches of space

No space

Before a trip, be sure to inspect all couplings. There should be no space between the upper and lower fifth wheel.

2 . Trailers with low underneath clearance can present challenges when driving over:

Bridges.

Railroad tracks.

Overpasses.

Railroad-highway crossings may be difficult to cross when pulling a trailer with a low underneath clearance. In particular, both low-slung units and single-axle tractors pulling long trailers are especially challenging to drive over raised crossings.

3 . When coupling a trailer:

Make sure to couple the proper glad hands.

Glad hands can be connected to any other glad hands.

Only one set of glad hands should be connected.

When coupling, make sure you couple matching glad hands. They are often color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.

4 . What is the tractor protection valve?

A valve that keeps air in the brake system should a bad leak occur

A valve that prevents the trailer from being accidentally released

A valve that prevents the vehicle from going too fast

A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.

5 . Failure to keep the fifth wheel plate properly greased could:

Cause the trailer to disconnect.

Cause steering problems.

Cause braking problems.

Affect the lights.

Failure to keep the fifth wheel plate properly lubricated can create friction between the tractor and trailer, causing steering problems.

6 . One way to prevent a rollover is to:

Move cargo to the left side of the rig.

Keep cargo centered on the rig.

Move cargo to the right side of the rig.

Keep cargo as far from the ground as possible.

A rollover is more likely if cargo is unevenly loaded in a rig. To help prevent a dangerous rollover, it is important to keep a load as centered on the rig as possible.

7 . What happens when the wheels of a trailer lock up?

The trailer will usually continue to move in a straight line.

The trailer will disengage.

The trailer will likely swing around.

The trailer will stop.

A trailer tends to swing around, potentially resulting in a trailer jackknife, if its wheels lock up.

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2025 Connecticut | Frequently Asked Questions

A CDL Class B license in Connecticut allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or any such vehicle towing a vehicle not exceeding 10,000 pounds GVWR. It includes vehicles like straight trucks, large buses, segmented buses, and trucks towing smaller vehicles.

A Class B CDL license in Connecticut enables the holder to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or tow a vehicle not exceeding 10,000 pounds GVWR. This includes straight trucks, large passenger buses, segmented buses, dump trucks with small trailers, and trucks towing smaller vehicles.

To acquire a Class B CDL license in Connecticut, you must be at least 21 years old (18-20 for intrastate driving), possess a valid Connecticut driver's license, pass a vision test, and successfully complete a knowledge test. After that, you must obtain a Commercial Learner's Permit (CLP), hold it for 14 days minimum, and pass a skills test.

In Connecticut, you must be at least 21 years old to qualify for a Class B CDL license for interstate transport. However, if you plan to drive only within the state (intrastate transport), you can qualify at 18 years old. It's important to note that additional requirements must also be met.

Specific endorsements are not necessary for a Class B CDL license, but they can expand your job opportunities. Endorsements certify additional skills like operating a school bus (S), passenger vehicle (P), or tank vehicle (N). You can also get an H endorsement for transporting hazardous materials. Each endorsement requires passing an additional knowledge test.

The Class B CDL skills assessment in Connecticut includes three parts: a pre-trip vehicle inspection test, a basic vehicle control test, and an on-road driving test. These tests assess your ability to inspect your vehicle, control the vehicle in various situations such as backing and turning, and safely operate the vehicle in traffic.

Yes, Class B CDL license holders in Connecticut are restricted to driving single vehicles with a gross vehicle weight rating (GVWR) of 26,001 or more pounds, or a towed vehicle not exceeding 10,000 pounds GVWR. They cannot drive a combination of vehicles (like a tractor-trailer) unless they have a Class A CDL. Additionally, they must comply with federal hours-of-service regulations.

Yes, the written Class B CDL test in Connecticut can be taken in languages other than English. The Connecticut Department of Motor Vehicles provides the test in several languages. However, federal regulations require that all CDL holders must be able to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.

Yes, you can request accommodations for the Class B CDL written exam in Connecticut if you have a disability. The Connecticut Department of Motor Vehicles complies with the Americans with Disabilities Act (ADA) and provides reasonable accommodations like extra time, a separate testing room, or use of special equipment. Be sure to make your request well in advance of your scheduled test date.

Yes, if you fail the Class B CDL written test in Connecticut, you can retake it. However, you must wait at least 7 days before retesting. There's also a retest fee that you'll need to pay each time you retake the test. It's recommended to study the manual thoroughly before retaking the test to increase your chances of passing.