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The tanker endorsement applies to drivers who wish to drive a tank in Class A, B, or C CDL. To add this endorsement to your CLP/CDL, you must pass a knowledge test on the problems posed by large volume liquid cargos. The Maryland CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MD tanker test covers the following sections of the Maryland CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this MD tanker practice test now to prepare for the actual test!
1. Air brakes use ________ to make the brakes work.
compressed gases
compressed gas cylinders
compressed oil
compressed air
2. In vehicles with air brakes, the two markings on a front brake limiting valve are:
wet and dry.
left and right.
normal and slippery.
high and low.
3. Before operating the vehicle, the driver should:
should not review the vehicle inspection report and immediately try to find any vehicle defects.
review the last vehicle inspection report.
rely on the last vehicle inspection and skip the pre-trip inspection.
None of the above.
4. If there is a fire and you are not sure what to use to put it out, you should:
wait for firefighters.
use a fire extinguisher.
use water.
use dry powder.
5. ______ are _____ that have holes in them to let the liquid flow through.
Baffles; bulkheads
Bulkheads; tankers
Barriers; baffles
Barriers; bulkheads
6. On any upgrade, gravity:
slows you down.
doesn't affect your speed.
speed you up.
doubles your speed.
7. Watch out for black ice:
when the temperature is above freezing and the road is dry.
when it is snowing.
any time the temperature is below freezing and the road looks wet.
right after it starts to rain.
8. Texting while operating a commercial motor vehicle is:
acceptable if you are contacting your supervisor.
only allowed at night.
acceptable if you are contacting your dispacther.
9. Different materials expand:
at different rates.
at the same rate.
at rates determined by road conditions.
None of the above.
10. When inspecting tanks, which of the following is the most important thing you should check for?
Exhaust pipes
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Tanker Test - MD CDL

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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