Combination #2
Combination Vehicles Practice Test | California 2024 #2 Page 2 of 3
Train for FREE online with our California CDL combination vehicle 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 CA combination 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 DMV requirements for issuing a combination license may vary from state to state.
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8 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.
9 . The service air line is attached to the:
The service air line carries air and is controlled by either the foot brake or trailer hand brake. The service air line is attached to relay valves, which allow the trailer brakes to be applied quickly.
10 . While inspecting coupling, you should go under the trailer and:
While inspecting coupling, you should go under the trailer and look into the back of the fifth wheel. Ensure that the fifth wheel jaws are secured around the shank of the kingpin.
11 . Before a drive, ensure that air flows to all trailers by:
Rolling each trailer down a hill and testing the brakes.
Before a trip, ensure that air in the air brake system reaches all trailers. Do this by waiting for air pressure to build, then sending air to both the emergency and service lines and opening the shut-off valves on the rear of the last trailer. If air escapes from the shut-off valves in the rear of the combination, the air is being supplied to the entire vehicle.
12 . Pull out the trailer air supply control to test:
The landing gear.
Be sure to test the trailer emergency brakes before beginning a trip. After ensuring that the trailer rolls freely, you can test the emergency brakes by pulling out the trailer air supply control, or placing it in the "emergency" position. Pull forward slightly with the tractor and make sure the trailer does not move.
13 . Maintain a following distance of at least ____ for every 10 feet of your vehicle if you are traveling at a speed under 40 mph.
At speeds below 40 mph, you should allow at least one second of following distance for every 10 feet of your vehicle. Follow the same formula when traveling at faster speeds, then add one additional second to your following distance. Remember that larger vehicles require more space to stop than smaller vehicles.
14 . When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
Combination vehicles require more space on the road than other vehicles. When entering or crossing traffic while driving a combination vehicle, it is especially important that there is a large enough gap in traffic for you to safely do so.
2024 California | Frequently Asked Questions
In California, a Commercial Driver's License (CDL) Class A license allows the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed exceeds 10,000 pounds. This includes tractor-trailers, truck and trailer combinations, and livestock carriers.
A Class A CDL license in California allows the holder to operate vehicles such as tractor-trailers, truck and trailer combinations, tanker vehicles, livestock carriers, and flatbeds. These are typically vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more where the vehicle being towed exceeds 10,000 pounds.
To obtain a Class A CDL license in California, you must be at least 18 years old (21 for interstate driving), have a regular driver's license, pass a vision test, and complete a written knowledge exam. Additionally, you must complete a truck driving training course and pass the CDL skills test, which includes a pre-trip vehicle inspection, a basic control skills test, and an on-road driving examination.
In California, you must be at least 18 years old to apply for a Class A CDL for intrastate transport (within California only). However, to drive across state lines or to carry hazardous materials, you must be at least 21 years old. These age requirements are consistent with federal regulations.
Endorsements for a Class A CDL license are not required but can be beneficial. They allow the license holder to operate special types of vehicles. Common endorsements include H for hazardous materials, T for double/triple trailers, P for passenger vehicles, and N for tank vehicles. Each endorsement requires passing a separate knowledge test.
The Class A CDL skills test in California consists of three parts: a pre-trip vehicle inspection, a basic control skills test, and an on-road driving examination. The pre-trip inspection tests your knowledge about your vehicle and its operation. The basic control skills test assesses your ability to maneuver the vehicle in various situations. The on-road test evaluates your driving skills in traffic.
Class A CDL license holders in California must adhere to various regulations. They're limited to the type of vehicle specified on their license and endorsements. They must follow hours-of-service laws, which regulate driving time to prevent fatigue. Additionally, they're subject to stricter Blood Alcohol Content (BAC) rules, with a limit of 0.04% compared to the standard 0.08%.
Yes, in California, the written Class A CDL test can be taken in languages other than English. The California Department of Motor Vehicles (DMV) offers the test in multiple languages. However, the Federal Motor Carrier Safety Administration requires that all CDL holders understand and read English to ensure road safety.
Yes, you can request accommodations for the Class A CDL written test if you have a disability. The California Department of Motor Vehicles (DMV) provides reasonable testing accommodations under the Americans with Disabilities Act (ADA). You must submit a "Request for Accommodations" form to the DMV detailing your specific needs.
Yes, if you don't pass the Class A CDL written test in California, you can retake it. However, you must wait at least three days before retaking the test. Keep in mind that you'll have to pay a retest fee each time. If you fail three times, you'll need to start the application process over again.