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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. You should do an after-trip inspection:
once a month.
at least once a week.
after each trip.
2. When backing, it is best to:
use a helper whenever possible.
use only the passenger's side mirror.
try to back in the direction of the drift.
3. ________ is responsible for identifying the hazard class of the material when shipping.
The driver
The shipper
The motor carrier
4. When driving a tanker, liquid surge:
results from movement of the liquid in full tanks.
can have bad effects on handling.
should notĀ  be a concern.
5. The best way to recognize that your trailer has started to skid is:
by recognizing tire failure.
by seeing it in your mirrors.
by feeling the brakes come on.
6. Which of the following is not a place where the shipping papers may be kept?
In a pouch on the driver's door
In a pouch on the passenger's door
In clear view within reach while driving.
7. When backing a trailer, you should turn the steering wheel to the right to make the trailer go left (or vice versa). Once the trailer starts to turn, you should:
keep backing up.
turn the wheel moreĀ  in the direction you want to go.
turn the wheel the other way to follow the trailer.
8. If you are feeling sleepy, you should:
get some coffee.
pull off the road and rest.
slow down.
9. Drivers of vehicles transporting HazMat should:
ensure that all relevant placards are carried in the passenger compartment.
compare the shipping paper to the markings and labels.
ensure that all packages are labeled as flammable materials.
10. The heavier the vehicle:
the higher the center of gravity will be.
the less work the brakes must do to stop it.
the more work the brakes must do to stop it.
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OK CDL Tanker Test

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