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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. Air tank drains:
are used to remove water and oil from the air tanks.
should not be used in wet weather.
protect the tanks and the rest of the system from too much pressure.
2. For safety during a trip, you should:
watch gauges for signs of trouble.
check critical items when you stop.
All of the above.
3. Never drive a tank vehicle:
with open valves or manhole covers.
with closed valves or manhole covers.
with valves or manhole covers.
4. A person attending a placarded parked vehicle:
must know what to do in emergencies.
must be in the vehicle, awake, or within 100 feet of the vehicle, and have the vehicle within clear view.
All of the above.
5. If the engine catches fire, you should:
open the hood as soon as you can.
turn off the engine as soon as you can.
avoid shooting foam from the vehicle's underside.
6. A placarded vehicle must have at least ___ identical placards.
7. When backing, it is best to:
try to back in the direction of the drift.
use a helper whenever possible.
use only the passenger's side mirror.
8. If your brakes fail on a steep mountain downgrade, you should:
use an escape ramp if it is available.
leave the road immediately.
go right if the shoulder is clear.
9. If you're feeling tired while driving you should:
stop driving and get some rest.
drink coffee.
eat something.
10. To know if your vehicle is equipped with ABS, look for:
an ABS placard.
the ABS logo on the steering wheel.
a yellow ABS malfunction lamps on the instrument panel.
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WA CDL Tanker Test

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