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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. Which of the following statements about backing heavy vehicles is true?
Back to the right side so that you can see better.
Always back as quickly as possible.
You should avoid backing whenever you can.
2. The two ways of knowing when to shift are:
weather and road conditions.
following distance and traffic speed.
engine speed and road speed.
3. What results from movement of the liquid in partially filled tanks?
Liquid waves
Liquid surge
Liquid splashes
4. With a dual air brake system:
each system shares air tanks.
each system shares the same lines and hoses.
each system has its own air tanks, hoses and lines.
5. A material’s hazard class reflects:
the risks associated with the material.
the type of packaging required to transport the material.
the methods for handling spills or leaks in the absence of fires.
6. If a shipping paper describes both hazardous and non-hazardous products, the hazardous materials must be:
listed at the bottom.
in the same color as the non-hazardous materials.
highlighted in a contrasting color.
7. Retarders:
reduce braking distance.
improve gas mileage.
help slow a vehicle, reducing the need for using brakes.
8. When backing, you should:
use the mirrors on both sides.
back quickly.
only use mirror on the driver's side.
9. Before driving a tank, you should:
check the tank's body for dents.
check the intake, discharge, and cut-off valves.
All of the above.
10. When driving a 50-foot truck at 40 mph, your minimum following distance should be:
6 seconds
4 seconds
5 seconds
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WA Tanker Test

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