Air Brakes #1
Air Brakes Endorsement Test | Colorado 2024 #1 Page 2 of 4
Train for FREE online with our Colorado 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 CO Class A/Class B driver license in 2024, 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.
25
20
20
7 . Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
100 psi
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
8 . Test the low pressure warning signal:
Before every trip.
It is essential that your low pressure warning light function properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.
9 . Anti-Lock Braking Systems (ABS):
Are illegal in some states.
ABS is equipped in addition to a vehicle's normal braking system and it neither increases nor decreases the vehicle's braking capability. ABS activates during hard applications of the brake pedal in order to prevent wheels from locking up.
10 . Truck tractors with air brakes built on or after March 1, 1997 must have:
A rear back-up camera.
Truck tractors with air brakes built on or after March 1, 1997 must be equipped with Anti-Lock Braking Systems (ABS).
11 . What is a wig wag?
A part within the braking unit that allows air to move freely
A wig wag is a type of low air pressure warning device in an air brake system. It drops a mechanical arm into the driver's view when the air pressure in the tanks falls below 60 psi.
12 . What do anti-lock brakes do?
Prevent a vehicle from accelerating while traveling downhill
The function of an Anti-Lock Braking System (ABS) is to prevent the vehicle's wheels from locking up from hard brake application.
2024 Colorado | Frequently Asked Questions
A CDL Class A license in Colorado is defined as a commercial driver's license that allows the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the GVWR of the vehicle(s) being towed is over 10,000 pounds. This typically includes tractor-trailers and truck and trailer combinations.
A Class A CDL license in Colorado allows you to operate vehicles such as tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds. These are typically vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more where the towed vehicle(s) exceed 10,000 pounds.
To obtain a Class A CDL license in Colorado, applicants must be at least 18 years old (21 for interstate driving), possess a valid driver's license, pass a vision test, and successfully complete knowledge and skills tests. They must also pass a Department of Transportation (DOT) physical examination and provide proof of residency and social security number.
In Colorado, you must be at least 18 years old to qualify for a Class A Commercial Driver's License (CDL) for intrastate driving (within Colorado only). However, to drive a commercial vehicle across state lines (interstate driving), federal regulations require drivers to be at least 21 years old.
Endorsements are not required for a Class A CDL license, but they can provide additional driving privileges. These include H (Hazardous Materials), N (Tank Vehicles), P (Passenger Vehicles), S (School Bus), T (Double/Triple Trailers), and X (Combination of Tank Vehicle and Hazardous Materials). Each endorsement requires additional knowledge tests, and some may require skills tests.
The Class A CDL skills test in Colorado includes three parts: the pre-trip inspection, the basic vehicle control, and the on-road test. You'll need to demonstrate knowledge of your vehicle's components, show you can control your vehicle in various situations, and prove your ability to safely drive in traffic.
Yes, there are limitations. A Class A CDL holder may be restricted from operating certain types of vehicles or transporting certain types of cargo depending on their qualifications, endorsements, and any restrictions listed on their license. Examples include air brake restrictions, manual transmission restrictions, or restrictions related to wearing corrective lenses while driving.
No, according to federal regulations, the written Class A CDL test in Colorado must be taken in English. This is to ensure that all commercial drivers can read and understand traffic signs and signals, directions, and other driving-related documents in English, which is essential for safety on U.S. roads.
Yes, you can request accommodations for the Class A CDL written test if you have a disability. The Colorado DMV is committed to providing equal access to its services. You should contact your local DMV office in advance to discuss your needs and arrange for any necessary accommodations. This might include assistive technology or extra time to complete the test.
If you don't pass the Class A CDL written test in Colorado, you can retake it. However, you must wait until the next day to do so. There's no limit to how many times you can retake the test, but keep in mind, each attempt requires a new fee. It's advisable to study thoroughly before retesting.