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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 Missouri CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MO tanker test covers the following sections of the Missouri CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this MO tanker practice test now to prepare for the actual test!
1. When fueling a vehicle containing hazardous materials, you should:
leave the engine on.
leave the nozzle unattended.
turn off the engine.
2. Some liquid tanks are divided into several smaller tanks by:
3. You should be especially alert for drunk drivers:
around shopping areas.
in the morning.
late at night.
4. After an accident, an improper use of flares could cause:
air pressure to build from 50 to 100 psi within 2 minutes.
a fire if spilled fuel is on the ground.
the springs to put on the brakes.
5. After starting the engine, the ABS light stays on. This means:
the ABS is in Neutral.
the ABS is not working properly.
the ABS is working properly.
6. You should flash your brake lights to warn drivers behind you when:
you see a hazard that will require slowing down.
you see a bus stops in the roadway ahead to unload passengers.
All of the above.
7. If your brakes fail on a steep mountain downgrade, you should:
decide what to do as soon as you know your brakes do not work.
slow down until your vehicle comes to a complete stop.
stay on the road and keep looking for the next available escape ramp.
8. Which of the following is not a sign of fatigue?
Keeping a steady speed
Frequent blinking
Rubbing eyes
9. Front-end header boards:
protect drivers from cargo in case of an accident or emergency stop.
protect drivers from spilled cargo.
should never be used.
10. Carrying liquids or gases in a leaking tank:
is illegal.
should be avoided whenever possible.
should only be done for shorter trips.
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MO CDL Tanker Test

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