Air Brakes Endorsement Test | Wyoming 2025 #2 Page 2 of 4
Train for FREE online with our Wyoming CDL air brake 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 WY Class A/Class B driver 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 the requirements for CDL may vary from state to state.
7 . Which part of the truck is the air compressor connected to?
In an air brake system, the air compressor is connected to the engine through gears or a v-belt.
8 . Air pressure should build up in a single air system within:
In single air systems, air pressure should build from approximately 50 to 90 psi within three minutes.
9 . What is brake lag?
Because air takes time to flow through the air lines to the brakes, air brakes cannot begin working instantly. There is often a brake lag of at least one-half of a second between the moment the brake pedal is pressed and the moment the brakes begin to work. On vehicles with hydraulic brakes, the brakes work instantly when the pedal is pressed.
10 . Do not use the parking brake when parking if:
A parking brake should not be used if the vehicle's brakes are very hot from use on a steep downgrade or if the brakes are very wet and temperatures are freezing. Using the parking brake when brakes are hot could cause damage to the brakes, and using the brakes when they are wet in freezing weather may cause the brakes to ice up, rendering the vehicle immobile.
11 . The ____ tells a driver how much pressure is in the air tanks.
A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.
12 . To stop a vehicle using air brakes:
To stop normally in a vehicle with air brakes, press down the brake pedal.
See the exact questions that will be on the 2025 Wyoming DMV exam.
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