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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 Oklahoma CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The OK tanker test covers the following sections of the Oklahoma CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this OK tanker practice test now to prepare for the actual test!
1. When going down grades, you should:
shift up.
put the transmission in Neutral.
downshift to a lower gear.
2. When loading and unloading smaller tanks with bulkheads, the driver must pay attention to:
safe driving rules.
weight distribution.
the shipping papers.
3. When driving trucks with trailers, drivers should:
push the brake pedal to the floor when braking.
make quick lane changes.
avoid making sudden movements with the steering wheel.
4. Liquid surge occurs in:
overfilled tanks.
partially filed tanks.
empty tanks.
5. ABS helps you:
brake harder.
drive faster.
None of the above.
6. Black ice is:
ice that makes the road look dry.
a thin layer of black ice.
None of the above.
7. For safety during a trip, you should:
check critical items when you stop.
watch gauges for signs of trouble.
All of the above.
8. When driving a tanker, you should:
increase your following distance.
decrease your following distance.
drive 10 mph below the posted speed limit.
9. A tank endorsement is required for certain vehicles that transport:
solid materials.
liquids or gases.
10. Your vehicle has air brakes. To stop, you should:
release the accelerator, push in the clutch, and shift to Neutral at the same time.
push the brake pedal down.
pull the parking brake control knob out.
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OK Tanker Test

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