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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 District of Columbia CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The DC tanker test covers the following sections of the District of Columbia CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this DC tanker practice test now to prepare for the actual test!
1. Forward-and-back surge is strongest in:
empty tanks.
unbaffled tanks.
baffled tanks.
bulkhead tanks.
2. To apply the parking brakes:
push the parking brake control knob in.
pull the parking brake control knob out.
push the brake pedal three times.
place the parking brake control knob in Neutral.
3. Empty trucks:
have more traction than full trucks.
require greater stopping distances than full trucks.
stop quicker when you use only the emergency or parking brake.
None of the above.
4. If you discover a cargo leak, you should call for help and:
continue driving in order to find a truck stop.
use shipping papers to identify the leaking material.
touch the leaking HazMat to identify the material.
try to identify the material by smell.
5. Baffles:
help to control the side-to-side liquid surge.
help to prevent cargo overload.
separate the load.
help to control the forward and backward liquid surge.
6. An Anti-lock Braking System:
keeps your wheels from locking when you brake hard.
increases a vehicle's stopping power.
lets you brake faster.
increases the distamce required to stop on slippery surfaces.
7. After an accident, an improper use of flares could cause:
the vehicle to slide back and forth.
a fire if spilled fuel is on the ground.
the springs to put on the brakes.
air pressure to build from 50 to 100 psi within 2 minutes.
8. If there is a fire and you are not sure what to use to put it out, you should:
use a fire extinguisher.
use water.
wait for firefighters.
use dry powder.
9. A shipping paper for HazMat must include:
page numbers if the shipping paper has more than 1 page.
a proper shipping description for each HazMat.
a shipper's certification signed by the shipper.
All of the above.
10. You or your employer must call the National Response Center when any of the following occur as a direct result of a HazMat incident, EXCEPT:
an injured person requires hospitalization.
black ice makes the road look wet.
spillage occurs.
a person is killed.
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DC CDL Tanker Test

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