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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 Washington CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The WA tanker test covers the following sections of the Washington CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this WA tanker practice test now to prepare for the actual test!
1. When coming to a stop, the liquid in the tank may surge, causing:
the vehicle to be pushed forward.
the vehicle to stop quicker.
causing the drive wheels to spin.
2. Strong winds can make it difficult to stay in your lane, especially when:
driving at speeds below 40 mph.
going into tunnels.
coming out of tunnels.
3. You are more at risk of being fatigued:
when stopping periodically during long trips.
after getting more than 8 hours of sleep.
when driving alone.
4. When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
convex mirrors make things look larger and closer than they really are.
you should check your after the start of any trip to make sure they are properly adjusted.
there are blind spots that your mirrors cannot show you.
5. If you are being tailgated, you should do all of the following except:
Increase your following distance
Reduce your speed gradually
Turn on your taillights
6. You should do an after-trip inspection:
once a month.
after each trip.
at least once a week.
7. Liquid surge occurs in:
partially filed tanks.
overfilled tanks.
empty tanks.
8. Which of the following vehicles is most likely to turn over?
3 axle tractor semitrailer
65 ft. conventional double
Triple trailer
9. When loading and unloading smaller tanks with bulkheads, the driver must pay attention to:
weight distribution.
safe driving rules.
the shipping papers.
10. Liquid surge occurs:
in full tanks.
in empty tanks.
in partially filled tanks.
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WA Tanker CDL Test

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