Combination #2
Combination Vehicles Practice Test | Texas 2025 #2 Page 3 of 3
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.
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15 . During a trip, which shut-off valves should be open?
No shut-off valves should be open.
When starting a trip, be sure that all shut-off valves are in the open position, except for the last valves on the rear trailer. It is important that air reaches the brakes on all trailers and that the air is not able to escape from the back of the vehicle.
16 . A combination vehicle has:
Four air lines.
Combination vehicles have two air lines: a service line and an emergency line.
17 . The service air line is attached to the:
Steering wheel.
The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.
18 . To test the trailer service brakes, you should:
Move the vehicle forward slowly and apply the brakes with the hand control.
To test the trailer service brakes, you should first ensure that the braking system has a normal air pressure level, then release the parking brake. You should then move the vehicle forward slowly and apply the brakes with the hand control. If the trailer service brakes are working properly, you will feel the brakes activate.
19 . To prevent a rollover, a driver should:
Turn quickly.
Rollovers can happen when a combination vehicle is turned too quickly. To help prevent the risk of rollover, it is important to keep the vehicle's center of gravity low by loading cargo as close to the ground as possible.
20 . One function of the emergency air line is to:
Control the ability to maneuver during bad weather conditions.
The emergency air line (also known as the supply line) has two functions. The first is to supply air to the trailer air tanks, and the second is to control the emergency brakes on combination vehicles.
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.