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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 Wyoming CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The WY tanker test covers the following sections of the Wyoming CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this WY tanker practice test now to prepare for the actual test!
1. Smooth bore tanks:
expand by different amounts depending on the liquid.
have nothing inside to slow down the flow of liquid.
have bulkheads with holes to let the liquid flow through.
have bulkheads in them with holes to limit the flow of liquid.
2. When driving a tanker, you should:
decrease your following distance.
stop every 50 miles to inspect your vehicle.
drive 10 mph below the posted speed limit.
increase your following distance.
3. While you are driving a tanker, the front wheels begin to skid. Which of these is most likely to occur?
The truck will roll over.
You will keep moving forward no matter how you steer.
Excessive heat will cause chemical changes in the brake lining, which reduce friction.
Your tires will fail soon.
4. Baffles:
help to control the side-to-side liquid surge.
help to control the forward and backward liquid surge.
separate the load.
help to prevent cargo overload.
5. To make the brakes work, air brakes use:
compressed air.
hydraulic air.
carbon monoxide.
6. _________ are sometimes called "smooth bore" tanks.
Tanks made of aluminum
Liquid tankers with baffles
Unbaffled liquid tankers
None of the above.
7. Air brakes use ________ to make the brakes work.
compressed gases
compressed gas cylinders
compressed oil
compressed air
8. Hauling liquids in tanks requires special skill because of:
the high center of gravity.
danger of surge.
liquid movement.
All of the above.
9. Empty vans are:
the same height as fully loaded ones.
lower than fully loaded ones.
higher than fully loaded ones.
None of the above.
10. To prevent fatigue during long trips you should:
rely on caffeine.
take a cold shower.
take frequent breaks.
All of the above.
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WY CDL Tanker Endorsement

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