Knowledge Test Class B #1
Class B Driving Test | Delaware 2026 #1 Page 2 of 7
Train for FREE online with our Delaware 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 DE 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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8 . During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
4 psi in one minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A single vehicle with air brakes should have a leakage rate no higher than 3 psi in a minute during an applied leakage test.
9 . If a tire rim is damaged, it should be:
Put on the axle farthest from the driver.
Wheels or rims with welding repairs are not safe.
10 . Maintaining a cushion of space between your vehicle and the vehicle ahead is:
For safe driving, it is essential that you maintain cushions of space on all sides of your vehicle. This helps to ensure that you will have time to take appropriate action if a problem arises.
11 . The radiator cap:
Never remove the radiator cap or any part of the pressurized cooling system until it has cooled. Opening the cap while the system is too hot could release steam and boiling water that could severely burn you. If the radiator cap is cool to the touch, the system is likely cool enough for you to open the cap.
12 . Looking far ahead of your vehicle while driving is:
Good drivers look down the road at least 12 to 15 seconds ahead of their vehicles. This makes it possible to identify hazards early, when drivers are more likely to have time to respond appropriately.
13 . Of the following, which is not a way to prevent drowsiness during a trip?
Avoiding medications that may cause drowsiness
Driving while fatigued can be extremely dangerous. Strategies for preventing drowsiness while driving include getting a full night's sleep before a trip; having someone ride with you so you can take turns driving; scheduling trips for times during which you are normally awake; and avoiding medications that may cause drowsiness.
14 . While still below the legal limit, a driver operating a CMV with a detectable amount of alcohol in their system will:
If you are found to have any detectable amount of alcohol in your system while operating a CMV but your blood alcohol concentration (BAC) is still below the legal limit of 0.04 percent, you will be put out-of-service for 24 hours. It is both illegal and dangerous to operate a motor vehicle while under the influence of alcohol.
2026 Delaware | Frequently Asked Questions
To secure a CDL Doubles/Triples endorsement in Delaware, you must already have a Commercial Driver's License (CDL). You'll then need to pass the doubles/triples endorsement knowledge test. Additionally, check if you need to meet any other specific requirements set by the Delaware Division of Motor Vehicles (DMV) such as age or experience criteria.
To obtain a CDL Doubles/Triples endorsement, you must already hold a Commercial Driver's License (CDL). You'll then need to pass a knowledge test on handling large trucks with more than one trailer. This will cover topics like coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. Check with your local DMV for any additional requirements.
While having experience or training driving large trucks can be beneficial, it is not explicitly required for a CDL Doubles/Triples endorsement. However, you must pass a knowledge test on handling such vehicles. Some drivers choose to take a training course to prepare for the test, but this is not mandatory according to Delaware DMV regulations.
Yes, to obtain a CDL Doubles/Triples endorsement in Delaware, you must pass a written knowledge test. This test covers topics such as coupling and uncoupling, inspecting doubles and triples, and handling these vehicles. No additional driving skills test is required beyond the initial CDL exam.
The CDL Doubles/Triples endorsement test in Delaware is a written test, not a skills or driving test. Therefore, you won't need to showcase specific maneuvers. The test covers knowledge areas like handling double/triple trailers, coupling and uncoupling, inspection procedures, and air brake checks. It's important to study these topics thoroughly.
No, it is not permissible to operate double/triple trailers without a valid CDL Doubles/Triples endorsement in Delaware. Operating such vehicles without the appropriate endorsement can lead to serious penalties, including fines, license suspension, and potential disqualification from obtaining future endorsements.
You can add the CDL Doubles/Triples endorsement to your existing commercial driver's license in Delaware. You don't need to initiate a new application for a CDL. However, you must pass the required knowledge test and pay the necessary fees to obtain this endorsement. Always check with your local DMV for specific procedures and requirements.
Yes, there are limitations for drivers with a CDL Doubles/Triples endorsement in Delaware. Drivers must follow all federal and state regulations regarding weight limits, length restrictions, and safety protocols. Also, drivers with this endorsement are not allowed to operate other types of commercial vehicles unless they have the appropriate endorsements for those vehicles as well.
The maximum weight for double/triple trailers in Delaware is 80,000 pounds. The length limit for double trailers is 28.5 feet per trailer, and for triple trailers, it's 28.5 feet for the first two trailers and 28 feet for the third trailer. However, triple trailer combinations are generally not allowed on most roads in Delaware.
Yes, drivers with a CDL Doubles/Triples endorsement must adhere to specific safety regulations. These include conducting pre-trip inspections, securing the coupling devices properly, maintaining safe following distances, and understanding high-risk crash areas. Drivers must also comply with hours of service regulations and ensure proper loading and weight distribution of cargo.