Maryland Tanker Vehicles Test
Learn how liquid surge can push your tanker on the Bay Bridge crosswinds and what to do when I-70 turns icy west of Hagerstown.
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Twenty questions, 80% to pass. Maryland's tanker test covers surge control, loading procedures, and the roads you'll actually drive.
Key Topics
- •Liquid surge control
- •Safe loading and unloading
- •Rollover prevention on Maryland highways
About the Maryland Tanker Vehicles Test
Topics Covered
- ✓Liquid surge and how it affects braking on I-95's stop-and-go traffic — surge can push your truck forward when you stop
- ✓Loading and unloading procedures for tankers — Maryland's weight limits on the Bay Bridge matter here
- ✓Proper baffle operation and when to use them — especially on I-70 mountain grades west of Frederick
- + 3 more topics
📘 Study Tips & State Info
Maryland examiners focus on surge control more than any other topic. Expect at least 5 questions about how liquid moves in a tank when you brake, accelerate, or turn. Understand the difference between baffled and unbaffled tanks. Baffles reduce surge but don't eliminate it — that's a common trick question.
Pay attention to the Maryland CDL manual's section on loading. They ask specific questions about filling percentages and weight distribution. If you're hauling milk from a farm in Carroll County, you need to know how much to fill each compartment. Overfilling causes surge. Underfilling lets the liquid slosh.
Practice with our timed test. The MVA gives you 25 minutes — that's about 75 seconds per question. Use it. You don't have time to second-guess. Learn the rules for when to use your emergency shutoff valve. That's another favorite topic for Maryland test writers.
The Maryland MVA handles all CDL testing. You can take the tanker knowledge test at any MVA office that offers CDL services. Major locations include Glen Burnie (headquarters), Baltimore City (Reisterstown Road Plaza), Largo (MVA Express), and Frederick. You need an appointment for CDL testing — walk-ins rarely get in.
The test fee for the tanker endorsement is $30. You pay when you take the written test. If you pass, the endorsement goes on your license when you get your CDL or renew. You must have a valid Medical Examiner's Certificate on file before you can take any CDL knowledge test.
Maryland doesn't require a separate hazmat endorsement for tankers unless you're hauling hazardous materials. Many tanker drivers haul both — fuel, propane, or chemicals. If that's you, you'll need the Hazmat endorsement too. That test is separate and includes a TSA background check.
About the Maryland Tanker Vehicles Test
The Maryland Tanker Vehicles endorsement is for any CDL holder who transports liquids in bulk — fuel, milk, chemicals, or water. If you're hauling a tank that's over 1,000 gallons, you need this endorsement on your license. The written test checks your knowledge of liquid surge, safe loading, and emergency procedures.
Maryland's roads make this tricky. You'll cross the Bay Bridge (US 50/301) with crosswinds that can shift your load. You'll climb I-70 through the mountains near Hancock where grades hit 6%. And you'll deal with stop-and-go on I-95 through Baltimore where surge can push you into the next lane if you don't know how to control it. The test reflects these realities.
The MVA administers this test at all CDL testing locations. You must pass the General Knowledge test first. The tanker test is 20 multiple-choice questions, and you need 16 correct to pass. You get 25 minutes. No exceptions.
Don't memorize answers — understand how liquid behaves in a partially filled tank. That's where most Maryland drivers fail. The test writers love questions about surge forces during braking and turning. We've built this practice test to match exactly what the MVA uses.
Topics Covered
Study Tips
Maryland examiners focus on surge control more than any other topic. Expect at least 5 questions about how liquid moves in a tank when you brake, accelerate, or turn. Understand the difference between baffled and unbaffled tanks. Baffles reduce surge but don't eliminate it — that's a common trick question.
Pay attention to the Maryland CDL manual's section on loading. They ask specific questions about filling percentages and weight distribution. If you're hauling milk from a farm in Carroll County, you need to know how much to fill each compartment. Overfilling causes surge. Underfilling lets the liquid slosh.
Practice with our timed test. The MVA gives you 25 minutes — that's about 75 seconds per question. Use it. You don't have time to second-guess. Learn the rules for when to use your emergency shutoff valve. That's another favorite topic for Maryland test writers.
Maryland Specific Information
The Maryland MVA handles all CDL testing. You can take the tanker knowledge test at any MVA office that offers CDL services. Major locations include Glen Burnie (headquarters), Baltimore City (Reisterstown Road Plaza), Largo (MVA Express), and Frederick. You need an appointment for CDL testing — walk-ins rarely get in.
The test fee for the tanker endorsement is $30. You pay when you take the written test. If you pass, the endorsement goes on your license when you get your CDL or renew. You must have a valid Medical Examiner's Certificate on file before you can take any CDL knowledge test.
Maryland doesn't require a separate hazmat endorsement for tankers unless you're hauling hazardous materials. Many tanker drivers haul both — fuel, propane, or chemicals. If that's you, you'll need the Hazmat endorsement too. That test is separate and includes a TSA background check.