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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 Colorado CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The CO tanker test covers the following sections of the Colorado CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this CO tanker practice test now to prepare for the actual test!
1. When the wheels of a trailer lock up:
the vehicle will gradually come to a complete stop.
the trailer will tend to swing around.
ABS will increase stopping power.
All of the above.
2. When you need to brake, you should warn the drivers behind:
by turning on the 4-way emergency flashers.
by making gestures.
by changing lanes.
by flashing your brake lights.
3. How can drivers help control surge?
By braking far in advance of a stop.
By decreasing following distance.
By releasing the brakes soon when coming to a stop.
All of the above.
4. Skids caused by acceleration can usually be stopped by:
coming to a complete stop.
taking the foot off the accelerator.
speeding up.
applying the brakes firmly.
5. If you discover a cargo leak, you should call for help and:
touch the leaking HazMat to identify the material.
try to identify the material by smell.
use shipping papers to identify the leaking material.
continue driving in order to find a truck stop.
6. When should you downshift automatic transmissions?
Watch your tachometer, and downshift when your engine reaches the top of the range.
When going down steep grades.
When you start to get drowsy.
When you want to go faster.
7. Brake fade:
results from excessive heat caused by using brakes too much.
is not affected by brake adjustment.
relies on the engine braking effect.
All of the above.
8. Different materials expand:
at rates determined by road conditions.
at different rates.
at the same rate.
None of the above.
9. If the letter "G" appears in Column 1 of the Hazardous Materials Table, the description must also include:
the source of the HazMat.
the hazard class or division.
the shipper's name.
the technical name of the HazMat.
10. Hydroplaning:
can occur at speeds as low as 30 mph.
only occurs at extremely high speeds.
only happens when tire pressure is higher than normal.
never occurs at speeds below 40 mph.
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Tanker Test - CO CDL

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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