Knowledge Test Class B #2
Class B Driving Test | Texas 2026 #2 Page 6 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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36 . When crossing railroad tracks, you should:
Stay in your lane.
When crossing railroad tracks during the on-road driving skills test, you must not stop, switch gears, pass another vehicle, or change lanes while any part of your vehicle is in the crossing.
37 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 55 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
38 . When driving on the expressway during the skills test, you should:
Drive above the posted speed limit.
During the on-road driving skills test, you may be asked to drive on an expressway. Make sure you maintain proper lane positioning, vehicle spacing, and vehicle speed. Continue to thoroughly check traffic in all directions while on the expressway.
39 . When checking tire condition during the vehicle inspection, you should:
Ensure that the tires have even wear.
When examining your tires during the vehicle inspection test, you should ensure that treads are evenly worn.
40 . To inspect slack adjusters on S-cam brakes, you need to:
Chock the wheels and disengage the parking brake.
Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.
41 . During the straight line backing exercise, how many times are you permitted to exit the vehicle to check its position?
Four times
During the straight line backing exercise, you are permitted to exit your vehicle to check its position no more than one time.
42 . On a truck with air brakes, the braking system’s air compressor:
Cleans the brakes.
