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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. With the controlled braking method:
you apply your brakes as hard as possible without locking the wheels.
you apply your brakes all the way and release the brakes when the wheels lock up.
you use the parking brake to lock the wheels.
you lightly tap the brakes.
2. When conducting a pre-trip inspection:
you should review the last vehicle inspection report.
the inspection report should only be reviewed if you will be carrying passengers.
the vehicle inspection report should not be reviewed unless your supervisor tells you to do so.
None of the above.
3. Texting is:
safer than talking on a cell phone.
safer than  engaging in conversation with a passenger.
about as safe as adjusting the radio.
the most dangerous distraction.
4. Empty trucks:
require the same stopping distance than full trucks.
require a greater stopping distance than full trucks.
require a shorter stopping distance than full trucks.
None of the above.
5. How many reflective triangles/emergency reflectors should you carry?
6. If a tank is leaking, you should:
continue the trip until you can pull into a service station.
get the leak fixed immediately.
flash your brake lights to warn other motorists.
call your dispatcher or supervisor for instructions.
7. Right after it starts to rain, the road is very slippery. Why?
Because rain is very slippery.
Because black ice may form on the road.
Because the water mixes with oil left on the road by vehicles.
None of the above.
8. If radioactive material is involved in a leak or broken package:
do not use the vehicle until it is cleaned.
immediately contact the fire department.
do not touch the leaking package and drive to the nearest service station.
clean the vehicle without touching the radioactive material.
9. A person attending a placarded parked vehicle:
must know what to do in emergencies.
must be able to move the vehicle, if needed.
must be in the vehicle, awake, or within 100 feet of the vehicle, and have the vehicle within clear view.
All of the above.
10. Air brakes use ________ to make the brakes work.
compressed air
compressed gases
compressed gas cylinders
compressed oil
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CO CDL Tanker 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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