Knowledge Test Class B #1
Class B Driving Test | California 2026 #1 Page 7 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.
50
40
20
43 . A safety valve is set to open at ____ pounds per square inch (psi).
The safety valve protects air tanks and the rest of an air brake system from accumulating too much air pressure. The safety valve is usually set to open at 150 psi.
44 . Texting while driving is especially dangerous because:
Texting while driving is particularly dangerous because it is both a mental and physical distraction to the driver. In addition to diverting a driver's mental attention away from the road, texting requires a person to remove at least one hand from the vehicle's controls.
45 . 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.
46 . What does an air compressor do in an air brake system?
In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor governor.
47 . An empty truck:
Empty trucks require longer stopping distances than full trucks because they have less traction available.
48 . When you need to stop in an emergency, you should:
If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle traveling in a straight line while still allowing you to turn, if necessary.
49 . Anti-Lock Braking Systems (ABS):
If equipped, ABS is in addition to a vehicle's normal braking system and does not increase or decrease the braking power of any other system. ABS only activates when a vehicle's wheels are about to lock.
50 . An application pressure gauge shows:
If a vehicle is equipped, an application pressure gauge shows how much air pressure is being applied to the brakes. This gauge can help a driver identify if their brakes are beginning to fade.
2026 California | Frequently Asked Questions
To acquire a CDL Passenger endorsement in California, you must first have a commercial driver's license (CDL). Then, you need to pass a written passenger transport test and a skills test in the type of vehicle you'll be driving. You must also complete a medical examination and submit the Medical Examination Report form to the DMV.
To obtain a CDL Passenger license in California, you must hold a valid commercial driving license (CDL). You must then pass a written passenger transport test and a skills test in the type of vehicle you'll be driving. Additionally, you need to undergo a medical examination and submit the Medical Examination Report form to the DMV.
Yes, to secure a CDL Passenger endorsement in California, you need specific training to pass the written and skills tests required by the DMV. While not mandatory, professional training programs help you gain practical experience. These programs cover topics like vehicle inspection, on-road driving, and passenger safety, which are critical for the endorsement.
Yes, for a CDL Passenger endorsement in California, you are required to pass a written passenger transport test. This test focuses on specific knowledge related to carrying passengers, such as bus safety rules and procedures. This is in addition to the general knowledge test that is required for the base CDL.
During the CDL Passenger endorsement assessment, you will be expected to demonstrate your ability to safely load and unload passengers, respond to emergency situations, operate a vehicle of the same class as the one you plan to drive, and conduct vehicle inspections. Additionally, you'll need to show your ability to manage distractions and maintain a safe environment for passengers.
No, it is illegal to transport passengers in California without a valid CDL Passenger endorsement. This endorsement is required for drivers operating vehicles designed to carry 16 or more passengers, including the driver. Violating this law can lead to serious consequences, including fines, disqualification or suspension of your CDL, and even jail time in severe cases.
Yes, you can add the CDL Passenger endorsement to your existing Commercial Driver's License (CDL). You don't need a new application for your license, but you will need to pass the Passenger Vehicle written test and a skills test in a passenger vehicle. Ensure you have the correct class of CDL for the vehicle you plan to drive.
Yes, there are specific limitations for drivers with a CDL Passenger endorsement in California. For instance, you must not have more than two moving violations or at-fault accidents in the past two years. You also cannot have a DUI conviction within the past ten years. Furthermore, you must pass a physical examination every two years to ensure you're fit to drive.
Yes, in California, to acquire a CDL Passenger endorsement, you must be at least 21 years old. This is due to the fact that interstate driving or transporting hazardous materials is involved. However, at 18 years old, you can apply for a CDL for intrastate driving (within California only), but it won't include passenger endorsement.
With a CDL Passenger endorsement, you are eligible to operate vehicles such as buses, shuttles, and vans that are designed to carry 16 or more passengers, including the driver. This endorsement is particularly useful for those seeking employment as a bus driver in schools, public transit, and private charter companies.