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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 Oregon CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The OR tanker test covers the following sections of the Oregon CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this OR tanker practice test now to prepare for the actual test!
1. The service line is also called:
control line.
power line.
cable line.
brake line.
2. When approaching a vehicle as part of a pre-trip inspection, which of the following could be a sign of trouble?
Fresh oil under the vehicle
Inflated tires
Parking brake is on
All of the above
3. To avoid a hazard:
stopping is always the best thing to do.
driving on the shoulder of the road is always the best thing to do.
changing lanes is always the best thing to do.
steering away from what is ahead may be the best thing to do.
4. Which of these statements about using your mirrors is FALSE?
You should use your mirrors to spot overtaking vehicles.
When driving, you should check mirrors regularly to know where other vehicles are around you.
There are blind spots that your mirrors cannot show you.
None of the above.
5. If there is a fire and you are not sure what to use to put it out, you should:
wait for firefighters.
use dry powder.
use water.
use a fire extinguisher.
6. The amount of liquid to load into a tank depends on:
the weight of the liquid.
the amount the liquid will expand in transit.
legal weight limits.
All of the above.
7. The manifest for transporting hazardous wastes must be:
signed by hand.
attached to the appropriate placard.
uploaded to the cloud.
appear on both sides and ends of the vehicle.
8. The best way to recognize that your trailer has started to skid is:
by feeling the brakes come on.
by opening the window and feeling the front of the mirror.
by recognizing tire failure.
by seeing it in your mirrors.
9. If your placarded trailer has dual tires, you should check the tires:
at the beginning of each trip and each time the vehicle is parked.
once every 3 months.
once a week.
once every 500 miles.
10. The steering wheel should:
be held firmly with the right hand.
be held firmly with the left hand.
be held with one hand at a time.
be held firmly with both hands.
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OR Tanker Test

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