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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. How can drivers help control surge?
By braking far in advance of a stop.
By releasing the brakes soon when coming to a stop.
By decreasing following distance.
2. If you must drive slowly, how should you alert following drivers?
Flash your brake lights
Turn on your taillights
Use your emergency flashers if it is legal
3. After an accident, an improper use of flares could cause:
the springs to put on the brakes.
a fireĀ if spilled fuel is on the ground.
air pressure to build from 50 to 100 psi within 2 minutes.
4. When should you downshift automatic transmissions?
When you start to get drowsy.
When going down steep grades.
Watch your tachometer, and downshift when your engine reaches the top of the range.
5. Before leaving your vehicle unattended, you should:
Remove the keys.
Apply the parking brake.
All of the above.
6. Class 2 hazardous materials include:
Radioactive materials
Flammable gases
7. Too little weight on the driving axles can cause:
mechanical damage.
poor traction.
longer stopping distances.
8. An Anti-lock Braking System:
increases a vehicle's stopping power.
increases the distamce required to stop on slippery surfaces.
keeps your wheels from locking when you brake hard.
9. On any upgrade, gravity:
slows you down.
speed you up.
doubles your speed.
10. Which of the following statements about drivers fixing an engine or changing a tire is true?
Roadway traffic is not a danger to them.
They usually pay attention to the danger roadway traffic is to them.
They often do not pay attention to roadway traffic.
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OK Tanker CDL Test

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