Combination Vehicles Practice Test | Texas 2025 #2

Train for FREE online with our Texas 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 TX 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 22

1 . If a trailer's spring brakes do not release when you push the tractor air supply control, you should:

Check the air line connections.

Release the pintle hook.

Replace the spring brakes.

Drive normally without checking anything.

It is important that all of your vehicle's equipment is in proper working condition before you begin a trip. If a trailer's spring brakes do not release when you push in the tractor air supply control, you should make sure the air line connections are properly attached and sealed.

2 . Air pressure in the ____ air line is controlled by either the foot brake or trailer hand brake.

Emergency

Service

Rear

Auxiliary

Air pressure in the service air line is controlled by either the foot brake or trailer hand brake. The service air line is also known as the control line or signal line. This line is connected to relay valves, which allow the trailer brakes to be applied more quickly than would otherwise be possible.

3 . Starting in which year were newly manufactured trailers required to have ABS?

1972

1987

1998

2004

All trailers and converter dollies manufactured on or after March 1, 1998 must be equipped with Anti-Lock Braking Systems (ABS).

4 . An air supply control in its "emergency" position will:

Turn on the air supply.

Apply the trailer emergency brakes.

Prevent a skid.

Accelerate the vehicle.

Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "emergency" position, the air supply will be stopped and the trailer emergency brakes will be applied.

5 . ____ are the cause of more than half of all accident-related truck driver deaths.

Truck rollovers

Motorcycles

Slippery roads

Pedestrians

More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.

6 . A lightly-loaded combination vehicle will stop more slowly than a fully-loaded vehicle because:

The stiff suspension springs and strong brakes will have high traction.

The stiff suspension springs and strong brakes will have low traction.

The brakes only operate when a trailer reaches a minimum weight.

The suspension springs only operate when a trailer reaches a minimum weight.

An empty combination vehicle will come to a complete stop more slowly than a fully-loaded vehicle. The stiff suspension springs and strong brakes will have lower traction on a light trailer than they would if the vehicle carried more weight.

7 . To help prevent rollovers, you should:

Accelerate quickly after stopping.

Drive slowly around turns.

Keep the load near the back of the trailer.

Keep the load on one side of the trailer.

To lower the risk of a rollover, load your cargo as closely to the ground as possible. To further reduce this risk, take curves and corners slowly.

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2025 Texas | Frequently Asked Questions

To secure a CDL Bus endorsement in Texas, you must first possess a Commercial Driver's License (CDL). Next, pass the Passenger Vehicles endorsement written test. Then, get a school bus endorsement by passing the School Bus endorsement written test. Lastly, complete a driving skills test in the type of vehicle you'll be driving. This includes pre-trip inspection, basic vehicle control and on-road driving.

To obtain a CDL Bus license in Texas, you must have a valid Texas driver's license, be at least 18 years old (21 if driving interstate), and pass a medical examination. You'll also need to pass the CDL general knowledge test, the passenger transport test, and the school bus endorsement test. Finally, you must successfully complete the CDL skills test in a school bus.

Yes, specific training is required for a CDL Bus endorsement in Texas. You must pass the general knowledge test, Passenger Endorsement, and School Bus Endorsement tests. Additionally, you'll need to pass a driving skills test in a vehicle similar to the bus you plan to drive. Some applicants find it helpful to take professional driving courses before testing.

CDL Bus licenses in Texas fall under Class B or Class C. Class B is for vehicles designed to carry 24 passengers or more, including the driver. This includes school and city buses. Class C is for smaller vehicles designed to carry 16 to 23 passengers, including the driver. Both require the Passenger (P) endorsement, and school buses additionally require the School Bus (S) endorsement.

No, you cannot use your personal vehicle for the CDL Bus driving test in Texas. The vehicle you use must match the class of CDL you are applying for. Therefore, if you're applying for a CDL Bus license, you'll need to test in a bus that fits the classification of the license you're seeking.

The CDL Bus driving test in Texas evaluates skills such as pre-trip vehicle inspection, basic vehicle control, and on-road driving. You'll be assessed on maneuvers like stopping, turning, merging into traffic, and navigating intersections. Also, proper use of mirrors, signaling, speed control, and responding appropriately to road signs and traffic signals will be evaluated.

Yes, additional medical prerequisites are required for a CDL Bus endorsement in Texas. Applicants must pass a Department of Transportation (DOT) physical examination every 24 months. This includes vision and hearing tests, a blood pressure check, and checks for other physical conditions that could affect driving ability.

No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Texas. This endorsement is required for drivers who wish to drive a bus or vehicle designed to transport 16 or more passengers, including the driver. Operating such a vehicle without the proper licensing can lead to significant fines and penalties.

In Texas, you can add a CDL Bus endorsement to your existing license. You don't need to apply for a new license. However, you'll need to pass the Passenger Vehicles written test and a skills test in the vehicle type that matches the class and type of vehicle you'll be driving.

Yes, there are certain restrictions for drivers with a CDL Bus endorsement in Texas. For example, a driver with a CDL Bus endorsement cannot drive a bus under the influence of alcohol or drugs, or commit traffic violations. Also, they are subject to random drug and alcohol testing as part of the Federal Motor Carrier Safety Administration regulations.