Knowledge Test Class B #2
Class B Driving Test | California 2026 #2 Page 4 of 7
Train for FREE online with our California 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 CA 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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22 . The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
When performing a static leakage test on a triple combination vehicle with air brakes, the leakage rate should be no more than 5 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
23 . Air tank drains:
Compressed air in an air brake system usually has a certain amount of water and oil in it. This can harm the system if allowed to accumulate. Air tanks have drain valves to aid in removing water and oil from the compressed air.
24 . Which of the following is not part of a vehicle’s air brake system?
Components of an air brake system include an air compressor, an air compressor governor, air storage tanks, air tank drains, an alcohol evaporator, a safety valve, a brake pedal, foundation brakes, supply pressure gauges, an application pressure gauge, a low air pressure warning signal, a stop light switch, a front brake limiting valve (on some older vehicles), spring brakes, and parking brake controls.
25 . If the low pressure warning signal activates while you are driving, you should:
If the low pressure warning signal activates while you are driving, it is important that you safely exit the roadway as soon as possible and park your vehicle. If the air pressure gets too low, the brakes will no longer work well enough for you to stop safely.
26 . When driving on a long downhill slope, you should brake by:
When approaching a long downgrade, you should shift into a lower gear then use proper braking techniques. Using the brakes alone could cause them to overheat and fail. The braking power of the engine, which is maximized by being in a lower gear, will be the principal way of controlling your speed on a downgrade.
27 . How are violation points against a CDL calculated?
Legal violations while operating a motor vehicle will result in points against a driver's license. Violations that occur while operating a commercial motor vehicle will incur points at one and a half times their original value.
28 . Cargo being transported should be checked:
Cargo should be inspected before beginning a trip, within the first 50 miles of the trip, and every three hours or 150 miles traveled thereafter. Cargo should be inspected every time the driver stops to take a break. The driver of a truck transporting cargo is responsible for the cargo being safely secured throughout the trip.
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2026 California | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in California, you must first possess a valid CDL. Then, you'll need to pass a written knowledge test about pulling double/triple trailers. This test covers topics such as coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. After passing the test, the endorsement will be added to your CDL.
To obtain a CDL Doubles/Triples license in California, you must have a valid Class A CDL. You'll need to pass a written knowledge test specific to double/triple trailers. This test covers topics like coupling and uncoupling, inspecting doubles and triples, and handling. You don't need a special skills test for this endorsement.
While California doesn't require specific training to get a CDL Doubles/Triples endorsement, it's beneficial. Training can help you understand how to safely operate, couple/uncouple, and inspect these vehicles. You'll need to pass a written knowledge test, so studying is essential. Practical experience driving larger vehicles can also be beneficial for handling doubles/triples.
Yes, in California, to obtain a CDL Doubles/Triples endorsement, you must pass a written knowledge test specifically designed for this endorsement. The test covers topics such as safely pulling double/triple trailers, coupling and uncoupling, and inspecting these types of vehicles. This is in addition to the general CDL tests.
The CDL Doubles/Triples endorsement test in California is a written knowledge test, not a skills test. Therefore, you won't need to demonstrate any specific maneuvers. However, the test does cover topics such as coupling and uncoupling, inspecting doubles and triples, and handling these types of vehicles. Understanding these topics will be crucial to passing the test.
No, it's not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in California. This endorsement is required by law for drivers who wish to operate a vehicle towing two or three trailers. Driving without the appropriate license or endorsement can result in serious penalties, including fines and suspension of your CDL.
You can add the CDL Doubles/Triples endorsement to your existing commercial driver's license. You don't need to initiate a new application for a license. However, you will need to pass the specific written test for the endorsement and pay any associated fees. Remember, the endorsement is added to your CDL, not your regular driver's license.
Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement. They must only drive vehicles that they are licensed for, and must adhere to the maximum weight and length restrictions outlined by California law. Also, they must follow safety regulations such as conducting pre-trip inspections and adhering to hours-of-service rules. Violation of these rules can result in penalties or loss of the endorsement.
The maximum legal weight for any vehicle in California is 80,000 pounds, including double/triple trailers. The maximum legal length for a two-trailer combination is 75 feet, while a three-trailer combination is 65 feet. However, the length of the cargo in the trailer cannot exceed 53 feet. Exceeding these limits may require a special permit and could result in penalties.
Yes, drivers with a CDL Doubles/Triples endorsement must adhere to specific safety guidelines. These include conducting regular pre-trip inspections, securing cargo properly, maintaining safe following distances, and understanding the high rollover risk. Drivers must also comply with hours-of-service regulations to prevent fatigue-related accidents. Violating these safety rules can result in penalties or loss of endorsement.
