Maryland Tanker Endorsement Test (MD) 2026

4.8 out of 5 (116 votes)
80% Passing score
20 Questions
4 Mistakes allowed
As a Marylander preparing for your commercial driver's license (CDL), it's essential to get the right resources for your tanker endorsement. Our Maryland CDL tanker test is specifically designed to help you master the knowledge required for this endorsement. This 20-question MD tanker endorsement test is a valuable tool in assessing your readiness. You'll encounter questions on a range of topics, including liquid surge, weight distribution, emergency protocols, regulatory compliance, and vehicle inspections. Each question is multiple-choice, and to pass, you'll need to answer at least 16 correctly. Understanding the challenges of liquid surge and its impact on vehicle stability and handling is crucial for any tanker driver. This Maryland CDL practice test delves into these specifics, providing a thorough understanding of how to manage these challenges effectively. Regular specialized inspections are also emphasized, ensuring that your tank and vehicle components remain in optimal condition. While this Maryland MVA permit practice test is an excellent resource, it complements but does not replace state-certified driver's education or ELDT courses. Using it alongside these courses will give you a better grasp of the materials. Additionally, it's essential to note that obtaining a commercial driver's license also requires passing the general knowledge test. If you need preparation for this, we offer general knowledge prep tests as well. One of the key advantages of our Maryland learner's permit practice test is its availability. You can access it online, 24/7, allowing you to study at your convenience. Unlike traditional driving schools that require you to adhere to their schedules, our online test provides flexibility, fitting into your busy lifestyle. Whether you hold a commercial driver's license or a commercial learner's permit, this CDL tanker practice test is an indispensable part of your preparation toolkit. Get ready to ace your Maryland CDL tanker test and advance your driving career with confidence.
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Sample Maryland Tanker Test Questions

Question 1

When a partly filled tank vehicle stops, which motion describes forward-and-back liquid surge?

  1. A Liquid rising straight upward
  2. B Liquid moving back and forth inside the tank
  3. C Liquid draining toward the bottom outlet
  4. D Liquid remaining motionless

Correct answer: B – Liquid moving back and forth inside the tank

Liquid surge results from movement of cargo in a partially filled tank. During a stop, the liquid can move back and forth and strike the ends of the tank. That movement can push the vehicle in the direction the liquid wave is traveling.

Source: Maryland Commercial Driver License Manual — § 8.2.2, “Danger of Surge”

Question 2

Which tank condition is the main source of liquid surge?

  1. A A tank carrying only dry cargo
  2. B A low-mounted tank with a low center of gravity
  3. C A tank that is only partially filled
  4. D A tank with newly serviced brakes

Correct answer: C – A tank that is only partially filled

Surge develops from liquid movement in partially filled tanks. The open space allows the cargo to move as the vehicle accelerates, turns, slows, or stops. This movement can adversely affect handling and requires smooth vehicle control.

Source: Maryland Commercial Driver License Manual — § 8.2.2, “Danger of Surge”

Question 3

A cargo tank should be filled completely because leaving no open space prevents surge.

  1. A True
  2. B False

Correct answer: B – False

A cargo tank should never be loaded completely full. The Maryland CDL manual calls the space left for liquid expansion “outage.” Different liquids expand by different amounts, and the driver must know the applicable outage requirement when hauling bulk liquids.

Source: Maryland Commercial Driver License Manual — § 8.2.6, “Outage”

Question 4

How should a tank vehicle driver use the brakes when approaching a planned stop?

  1. A Release the brakes just before reaching the stop
  2. B Maintain steady pressure and avoid releasing the brakes too soon
  3. C Pump the brakes throughout the stop
  4. D Wait and apply the brakes abruptly

Correct answer: B – Maintain steady pressure and avoid releasing the brakes too soon

To help control surge, the driver should keep steady pressure on the brakes and avoid releasing them too soon while stopping. The driver should also begin braking well in advance and allow additional following distance. Abrupt braking can intensify cargo movement and reduce vehicle stability.

Source: Maryland Commercial Driver License Manual — § 8.3.2, “Controlling Surge”

Question 5

Why do smooth-bore tank vehicles require extra caution, especially when starting and stopping?

  1. A They contain only two baffles
  2. B They have no internal baffles to slow the liquid's flow
  3. C Their bulkheads completely prevent surge
  4. D Their liquid moves only during stops

Correct answer: B – They have no internal baffles to slow the liquid's flow

Smooth-bore, or unbaffled, tanks have nothing inside to slow the flow of liquid. Their forward-and-back surge can be especially strong during starts and stops. Drivers must operate these vehicles slowly and smoothly to manage that movement.

Source: Maryland Commercial Driver License Manual — § 8.2.5, “Un-baffled Tanks”

Question 6

Which item is special-purpose tank equipment that should be checked when installed?

  1. A A vapor-recovery kit
  2. B Portable reflective triangles
  3. C Roadside warning fusees
  4. D A driver's logbook holder

Correct answer: A – A vapor-recovery kit

The Maryland CDL manual lists vapor-recovery kits as special-purpose tank equipment that must work when installed. Other examples include grounding and bonding cables, emergency shutoff systems, and built-in fire extinguishers. Reflective triangles and fusees are emergency warning equipment rather than tank-specific equipment.

Source: Maryland Commercial Driver License Manual — § 8.1.2, “Check Special Purpose Equipment”

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