Combination #1
Combination Vehicles Practice Test | Maryland 2025 #1
Train for FREE online with our Maryland 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 MD combination license in 2025, 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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1 . Glad hands are:
Pleased drivers.
On trailers with air brakes, glad hands are coupling devices used to connect the air lines of the tractor to those of the trailer.
2 . When driving while pulling trailers, you should:
You should always steer gently and smoothly while pulling a trailer. Making sudden steering moves could cause the trailer to tip over.
3 . The trailer hand valve:
Should only be used when transporting cargo.
The trailer hand valve should not be used for parking. This could cause all of the air to leak out of the braking system, resulting in the brakes releasing. Instead, use the parking brake.
4 . What can the “crack-the-whip” effect do?
Make trucks decelerate.
The "crack-the-whip" effect can cause a trailer to turn over during a lane change. To avoid this phenomenon, drivers should make lane changes at slow, safe speeds.
5 . After connecting the air lines to the trailer while coupling, you should:
Connect the electrical cord.
Correctly following the steps to couple and uncouple trailers is vital to safely operating a combination vehicle. After connecting the air lines to the trailer while coupling, you should supply air to the trailer.
6 . Driving a combination vehicle ____ than driving a single vehicle.
Is safer in inclement weather
Driving a combination vehicle usually requires more skill than driving a single vehicle. Combination vehicles are generally longer and heavier than single commercial vehicles.
7 . What is a tractor protection valve?
A tractor protection valve keeps air in a tractor or truck air brake system should the trailer break away or develop a bad leak. The valve will close automatically if the pressure drops to an unsafe level.
2025 Maryland | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Maryland, you must first have a valid CDL. Then, pass a Transportation Security Administration (TSA) background check. After clearance, study for the Hazmat knowledge test using the Maryland CDL Manual. Schedule and pass the knowledge test at a Maryland MVA office. Once passed, the Hazmat endorsement will be added to your CDL.
To obtain a CDL Hazmat license, you must first hold a valid Commercial Driver's License (CDL). You'll also need to pass a background check by the Transportation Security Administration (TSA), provide proof of U.S. citizenship or lawful permanent residency, and pass the Hazardous Materials Endorsement Knowledge Test. A medical examination ensuring you are physically fit to operate a commercial vehicle is also required.
When applying for a CDL Hazmat endorsement, you need to provide proof of U.S. citizenship or lawful permanent residency (passport, birth certificate, or green card), a valid Commercial Driver's License (CDL), and proof of Social Security number. You also need to complete a Hazardous Materials Endorsement application and submit to a TSA background check.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. This test covers topics related to the transport of hazardous materials, including handling procedures, emergency situations, and federal regulations. You must pass this Hazardous Materials Endorsement Knowledge Test to obtain the endorsement on your Commercial Driver's License (CDL).
The CDL Hazmat endorsement written test covers several topics, including: the identification of different types of hazardous materials, loading and unloading procedures, proper placarding and marking of vehicles, emergency response procedures in case of a hazardous material incident, and understanding the federal regulations related to hazardous materials transportation.
Yes, there are extra charges associated with acquiring a CDL Hazmat endorsement. These include a fee for the written test, a fee for the endorsement itself, and a fee for the required TSA background check. The exact cost can vary, so it's best to check with the Maryland Motor Vehicle Administration for current prices.
Yes, obtaining a CDL Hazmat endorsement requires a federal security threat assessment, which includes a background check. The Transportation Security Administration (TSA) conducts this check. It involves fingerprinting and reviewing criminal, immigration, and terrorism records to ensure the applicant doesn't pose a security risk.
Yes, specialized training is mandatory for the CDL Hazmat endorsement in Maryland. Applicants must pass a written test based on the information contained in the Hazardous Materials section of the CDL Manual. After passing the test, an applicant must undergo a TSA background check before the endorsement is granted.
No, you cannot transport hazardous materials without a valid CDL Hazmat endorsement in Maryland. This endorsement ensures that drivers have the necessary knowledge and training to handle such materials safely. Driving without the proper endorsement can result in significant fines and penalties.
Yes, you can add the CDL Hazmat endorsement to your current CDL license in Maryland. You don't need to apply for a new CDL. However, you must pass the Hazmat knowledge test and undergo a Transportation Security Administration (TSA) background check to obtain the endorsement.