Knowledge Test Class B #2
Class B Driving Test | Idaho 2026 #2 Page 7 of 7
Train for FREE online with our Idaho 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 ID 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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43 . If an applicant does not receive an air brakes endorsement:
If you wish to be licensed to drive a CMV with air brakes, you must pass the air brakes knowledge test and use a vehicle with air brakes for your skills test.
44 . What does the air compressor governor do?
In an air brake system, the air compressor governor controls when the air compressor pumps air into the storage tanks. It stops pumping if the pressure in the tanks becomes too high, and begins pumping if the pressure becomes too low.
45 . When stopping, the brake pedal should be:
When stopping, it is best to gradually press down the brake pedal.
46 . Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.
Vehicles with ABS have yellow malfunction lamps to alert drivers when the braking systems are not working. Be sure you know where the malfunction lamp on your vehicle is before beginning a trip.
47 . How many daily hours of sleep does an adult need to maintain alertness?
Four to five
Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.
48 . When backing a truck, you should:
Backing a commercial motor vehicle is always dangerous because you cannot see everything behind you. When backing, make frequent checks of the mirrors on both sides of the vehicle.
49 . Brakes can get out of adjustment quickly, especially:
Brakes are particularly prone to getting out of adjustment if they are hot. Be sure to routinely check the adjustment of your brakes. For a vehicle to be safely controlled, all brakes must be properly functioning and adjusted.
50 . To determine if a vehicle can handle a load, you must know:
It is a driver's responsibility to make sure their vehicle is not overloaded. They must be aware of legal weight limits and the maximum weight that their vehicle is rated to carry, including the weight capacity rating of the suspension system.
2026 Idaho | Frequently Asked Questions
To acquire a CDL Tank endorsement in Idaho, you must have a valid Idaho CDL. You'll need to pass the Tank Vehicle written test administered by the Idaho Transportation Department. Study the CDL manual's section on tank vehicles. After passing the test, pay the required endorsement fee to add it to your CDL.
To obtain a CDL Tank license, it's essential to have a valid Commercial Driver's License (CDL). You must pass the Tank Vehicle written test, which covers the specific knowledge needed to operate tank vehicles safely. Studying the tank vehicle section in the CDL manual is crucial for passing this test. Lastly, pay the endorsement fee.
While specific training or experience isn't legally mandatory for a CDL Tank endorsement in Idaho, it's highly recommended. Understanding how to handle large, liquid-filled tanks is crucial for safety. Studying the tank vehicle section of the CDL manual and practical experience driving tank vehicles can significantly increase your chances of passing the Tank Vehicle written test.
Yes, obtaining a CDL Tank endorsement in Idaho requires passing an additional written test. This test focuses on the knowledge necessary to safely operate tank vehicles. It covers topics like high center of gravity, surge, bulkheads, baffles, and safe driving rules. The information for this test is found in the tank vehicles section of the Idaho CDL manual.
The written test for a CDL Tank endorsement covers a range of topics related to tank vehicles. These include inspecting tank vehicles, driving tank vehicles, and understanding the unique handling characteristics of tankers. It also covers safety rules, such as managing the vehicle's center of gravity and dealing with surge.
The CDL Tank endorsement written test in Idaho doesn't assess specific driving skills or maneuvers. It is a knowledge-based test focusing on understanding specific rules and safety measures for tank vehicles. Topics include the vehicle's high center of gravity, handling surge, understanding bulkheads and baffles, and adhering to safe driving rules. Practical skills are assessed separately in the general CDL driving test.
Yes, drivers with a CDL Tank endorsement face certain limitations. They can only operate commercial vehicles designed to transport liquids or gaseous materials within a tank that is permanently or temporarily attached to the vehicle. They are also required to comply with specific safety standards and procedures, such as handling hazardous materials and managing high center of gravity and surge.
No, you cannot legally transport liquid or gas materials in a commercial vehicle without a valid CDL Tank endorsement in Idaho. This endorsement is specifically designed to ensure that drivers have the necessary knowledge and skills to safely handle such materials. Driving without the appropriate endorsement can result in significant fines and penalties.
In Idaho, you can add the CDL Tank endorsement to your current license. You will need to pass the Tanker Knowledge Test and pay an additional fee. No fresh application is necessary. Remember to meet all the requirements and provide the necessary documents when applying for the endorsement.
Yes, handling hazardous materials with a CDL Tank endorsement requires adherence to specific regulations. Drivers must pass the Hazardous Materials (HazMat) endorsement knowledge test, and undergo a TSA background check. They must also follow safety procedures for loading, unloading, and transporting hazardous materials, and be aware of emergency response procedures.