Knowledge Test Class B #2
Class B Driving Test | Texas 2026 #2 Page 3 of 7
Train for FREE online with our Texas class B 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 B 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 B requirements may vary from state to state.
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15 . When taking the basic control skills test, drivers are:
Allowed to leave the vehicle, but only if the vehicle is placed in neutral and the parking brake is set.
During the basic vehicle control skills test, you must place the vehicle in neutral and set the parking brake before exiting the vehicle to check its position. You may check the position of the vehicle no more than twice, except during the straight line backing exercise, where you may look no more than once.
16 . What can happen if your vehicle has a high center of gravity?
The tires may not be able to handle the weight.
The height of a vehicle's center of gravity is very important. A high center of gravity (cargo piled up high or heavy cargo on the top of a load) increases the possibility of your vehicle tipping over.
17 . If approaching a railroad crossing while driving a placarded vehicle, you should always:
Change lanes while on the tracks.
If approaching a railroad crossing while driving a transit bus, school bus, or placarded vehicle, special procedures apply. Before crossing, stop your vehicle within 50 feet of, but not less than 15 feet from, the nearest rail. Activate your four-way flashers while crossing. Do not stop, change gears, or change lanes while any part of your vehicle is proceeding across the tracks.
18 . On trucks and buses, where are ABS malfunction lamps located?
Under the hood
Tractors, trucks, and buses with Anti-Lock Braking Systems (ABS) have yellow malfunction lamps located on their instrument panels. Trailers have yellow ABS malfunction lamps on their left side, either on the front or rear corner.
19 . If driving a school bus, your four-way flashers should:
Only be used near railroad tracks if a train is approaching.
When driving a school bus, you must activate your four-way flashers while approaching and crossing a railroad crossing. Deactivate the flashers once your entire vehicle has cleared the tracks.
20 . During a vehicle inspection, be sure that:
The emergency exits are not accessible from inside the cab.
During the vehicle inspection test, you must ensure that any emergency exit warning devices are working. All emergency exits should operate smoothly, be undamaged, and close securely from the inside.
21 . Why do you need to drain air tanks regularly?
To remove bad air from the tanks
