Knowledge Test Class A #1
Class A Driving Test | Texas 2026 #1 Page 2 of 10
Train for FREE online with our Texas class A license 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 CDL class A permit in 2026, 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 CDL class A requirements may vary from state to state.
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8 . Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:
Anti-Lock Braking Systems (ABS).
Truck tractors with air brakes that were manufactured on or after March 1, 1997 are required to be equipped with Anti-Lock Braking Systems (ABS). ABS is required in any other type of vehicle with air brakes that was manufactured on or after March 1, 1998.
9 . In a newer vehicle, you apply the parking brake:
By using a black round knob.
In a newer vehicle with air brakes, the parking brake is controlled by a diamond-shaped yellow knob. The knob is pulled out to apply the parking brakes and pushed in to release them.
10 . Spring brakes come on:
When the brakes are noisy.
Spring brakes come on automatically when air pressure drops to an unsafe psi level. Instead of waiting for the spring brakes to automatically activate, you should safely exit the road as soon as you notice the low pressure warning signal and bring your vehicle to a stop while you are still able to control the brakes.
11 . What color is the low air pressure warning light?
Purple
A low air pressure warning signal is required in vehicles with air brakes. The warning light is usually red and may be accompanied by a buzzer.
12 . During a vehicle inspection, ensure that the landing gear is:
Well lit.
When inspecting a trailer during a vehicle inspection test, ensure that its landing gear has no missing parts and that it is fully raised. The crank handle should be secure and the support frame should not be damaged.
13 . When approaching your vehicle, you should ensure that:
The vehicle is parked properly.
When approaching your vehicle before an inspection, make note of its general condition and ensure that it is not damaged or leaning. Look under the vehicle for fresh leaks. Check around the vehicle for hazards to movement, such as people, other vehicles, or low-hanging wires or tree limbs.
14 . Improperly loaded cargo can:
Aid in safety.
Cargo must be properly loaded and secured to prevent it from falling or shifting dangerously. During a quick stop, improperly loaded cargo could injure or even kill the driver.
2026 Texas | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Texas, you need to have a valid CDL license first. Then, study the Texas CDL handbook's section on Doubles/Triples endorsement. Afterwards, schedule an appointment at your local DMV to take the written test. Upon passing, you'll receive your endorsement. Remember, some employers may require additional on-the-job training.
To obtain a CDL Doubles/Triples license in Texas, you need to have a basic CDL license first. Then, pass the Doubles and Triples Endorsement Test which covers coupling and uncoupling, inspecting doubles and triples, and checking air brakes. Additionally, you must pass a vision test and provide proof of medical fitness.
While Texas doesn't require specific experience for a CDL Doubles/Triples endorsement, it's recommended to have practice handling such large vehicles. A CDL training course can provide this. You must pass a written test on handling double/triple trailers. Knowledge of coupling/uncoupling, inspecting trailers and air brakes is necessary. Professional training can greatly improve your chances of passing the test.
Yes, to obtain a CDL Doubles/Triples endorsement in Texas, you must pass an additional written test. This test covers information specific to driving double and triple trailers such as coupling and uncoupling, inspecting doubles and triples, and the proper procedures for pulling double/triple trailers. No additional road test is required for this endorsement.
The CDL Doubles/Triples endorsement test in Texas is a written exam, not a skills test. It focuses on knowledge such as how to couple and uncouple correctly, inspecting doubles and triples, and checking air brakes. You'll need to understand safe driving techniques for these larger vehicles, but you won't perform actual driving maneuvers during the test.
No, it's not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in Texas. The endorsement is a legal requirement, demonstrating that the driver has the necessary knowledge and skills to handle such large vehicles safely. Driving without the appropriate endorsement could result in penalties, fines, or even loss of your CDL.
You can add the CDL Doubles/Triples endorsement to your current commercial driver's license. You don't need to initiate a new application for a CDL. However, you must pass the Doubles/Triples knowledge test. Once you pass, the Texas Department of Public Safety will add the endorsement to your existing CDL.
Yes, there are constraints for drivers with a CDL Doubles/Triples endorsement. For instance, these drivers must comply with specific weight and length regulations for their vehicles. They may also face restrictions related to hazardous materials transport. Additionally, they must adhere to hours-of-service rules set by the Federal Motor Carrier Safety Administration to ensure safe driving practices.
In Texas, the maximum legal weight for a semi-truck is 80,000 pounds without an overweight permit. The maximum length for a single trailer is 59 feet, while double trailers can be up to 28.5 feet each, and triple trailers up to 28 feet each. However, triple trailers are not legal on all roads in Texas.
Yes, there are specific safety guidelines for driving double/triple trailers. Drivers must ensure proper coupling and uncoupling of units, maintain safe following distance, and manage high-speed and curve control. They must also be aware of the "crack-the-whip" effect that can occur when changing lanes or turning. Furthermore, drivers must abide by Federal Motor Carrier Safety Administration regulations for hours-of-service.