Tank Endorsement Test | Missouri 2026 #2

Train for FREE with our Missouri tank endorsement practice test online. 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 MO tank license 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 DMV requirements for issuing a CDL tank vehicle endorsement may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

1 . In the event of a fire, what should you do before opening trailer doors?

Check to see if the doors are hot.

Throw water on the doors.

Find someone else to open the doors.

If you are experiencing a truck fire, you should not attempt to open trailer doors without first feeling the doors to see if they are hot. If the doors are hot, there may be a cargo fire. In this case, leave the doors closed because opening the doors could worsen the fire by supplying it with more oxygen.

2 . Which of the following is not an indicator of when to upshift?

Road speed

RPMs

Time

There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

3 . You should not use your mirrors:

When changing lanes.

When making a turn.

To determine how fast you are traveling.

While regular mirror checks should be a part of your driving routine, it is particularly important to check your mirrors when changing lanes, turning, merging, and making tight maneuvers.

4 . When driving while pulling trailers, you should:

Make sudden turns with the steering wheel.

Avoid making sudden moves.

Push the accelerator to the floor when starting from a stop.

You should always steer gently and smoothly while pulling a trailer. Making sudden steering moves could cause the trailer to tip over.

5 . The radiator cap:

Should not be removed when the coolant is hot.

Can be removed when the coolant is hot.

Should be cool to the touch under normal driving conditions.

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.

6 . When using your turn signal, you should:

Signal before beginning the turn.

Turn the signal off before beginning the turn.

Signal only if vehicles are in front of you.

Always begin signaling well in advance of a turn. This is the best way to ensure that other drivers do not try to pass you. Without using a turn signal, drivers may assume that you are merely slowing down or stopping when you are planning to turn.

7 . When should mirrors be adjusted?

Before driving

While driving

After driving

Mirror adjustment should be checked prior to the start of any trip. If your vehicle has a trailer, the trailer must be straight in order for the mirrors to be checked accurately.

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2026 Missouri | Frequently Asked Questions

To acquire a CDL Passenger endorsement in Missouri, first, you need to have a valid Commercial Driver's License (CDL). Then, you must pass the passenger endorsement knowledge test and a skills test in the type of vehicle you wish to drive. The Missouri Department of Revenue administers these tests. Study materials are available on their website.

To obtain a CDL Passenger license in Missouri, you must be at least 18 years old, possess a valid Missouri CDL, pass the Passenger Transport written test, and pass a skills test in the type of vehicle you will be driving. You must also have a clean driving record and pass a medical examination.

Yes, you need specific training for a CDL Passenger endorsement in Missouri. This includes passing the Passenger Transport written test, and a skills test in a vehicle similar to the one you'll be driving. While not mandatory, it's beneficial to have experience or training driving larger vehicles or buses to help you pass these tests.

Yes, to obtain a CDL Passenger endorsement in Missouri, you must pass the Passenger Transport written test. This exam covers topics such as vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks. It's an additional requirement to the general CDL tests.

During the CDL Passenger endorsement assessment in Missouri, you will need to demonstrate skills such as pre-trip vehicle inspection, safe driving practices, proper use of mirrors, safe loading and unloading of passengers, responding to emergency situations, and understanding of passenger comfort and safety issues. You'll also need to perform specific maneuvers like turning, backing up, and parking.

No, you cannot legally transport passengers in Missouri without a valid CDL Passenger endorsement. This endorsement is specifically designed to ensure that drivers have the necessary knowledge and skills to safely transport passengers. Driving a commercial vehicle without the proper endorsements can result in fines, penalties, and potentially loss of your CDL.

Yes, you can add the CDL Passenger endorsement to your existing CDL. You don't need a new application for a CDL, but you will need to apply for the endorsement specifically, pass the necessary written test, and pay any associated fees. This process ensures you have the skills and knowledge to safely transport passengers.

Yes, there are specific limitations for drivers with a CDL Passenger endorsement in Missouri. They cannot have more than two moving violations in a three-year period. They must also pass a physical exam every two years, maintain a logbook of their driving hours, and comply with drug and alcohol testing regulations.

Yes, in Missouri, you must be at least 21 years old to drive a commercial vehicle across state lines (interstate) or to carry hazardous materials. However, you can get a CDL Passenger endorsement at 18 years old if you plan to drive within the state lines (intrastate). Note that some employers may have their own age-related policies.

With a CDL Passenger endorsement, you're eligible to operate vehicles such as buses, shuttles, or any vehicle designed to carry 16 or more passengers, including the driver. This also includes school buses if you also carry a School Bus (S) endorsement. Make sure to adhere to the specific regulations for each type of vehicle.