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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 Minnesota CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MN tanker test covers the following sections of the Minnesota CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this MN tanker practice test now to prepare for the actual test!
1. How should you apply the brakes when going down a steep downgrade?
Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
Apply the brakes when you reach the bottom of the downgrade.
Apply the brakes as hard as you can without locking the wheels.
You should not brake, and only use engine braking to prevent brake failure.
2. If your placarded trailer has dual tires, you should check the tires:
once every 500 miles.
once every 3 months.
once a week.
at the beginning of each trip and each time the vehicle is parked.
3. Right after it starts to rain, the road is very slippery. Why?
Because black ice may form on the road.
Because rain is very slippery.
Because the water mixes with oil left on the road by vehicles.
None of the above.
4. A liquid tank is divided into several smaller tanks by bulkheads. After filling the smaller tanks, most of the weight should be in the:
middle of the vehicle.
front of the vehicle.
top of the tank.
rear of the vehicle.
5. When backing, you should:
back quickly.
back and turn toward the right side whenever possible.
use the mirrors on both sides.
only use mirror on the driver's side.
6. The tire load for each tire is stated:
on the side of the tire.
on the inside of the tire.
on the vehicle's operator manual.
on the tread of the tire.
7. If you are carrying a heavy load that is slowing you down, you should:
drive on the shoulder.
drive in the left lane.
drive in the right lane.
keep the vehicle in third gear.
8. If you are being tailgated, you should do all of the following except:
Turn on your taillights
Increase your following distance
Reduce your speed gradually
Try to let the other vehicle pass
9. Placards must be:
readable from all 4 directions.
in a diamond shape.
turned upright on a point.
All of the above.
10. Shipping papers must include:
what the materials will be used for.
the price of the hazardous materials.
an emergency response telephone number.
All of the above.
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MN CDL Tanker Endorsement

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