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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. Controlled braking:
involves pumping the brakes while keeping steering wheel movements very small.
involves locking the wheels and then releasing the brakes.
can be used to keep your vehicle in a straight line and allow you to turn if necessary.
must be used when you need to turn sharply while braking.
2. Before driving a tank, you should:
check the tank's body for dents.
check the intake, discharge, and cut-off valves.
make sure manhole covers have gaskets and they close correctly.
All of the above.
3. For safety during a trip, you should:
use your senses to check for problems.
watch gauges for signs of trouble.
check critical items when you stop.
All of the above.
4. If coolant has to be added to a system without a recovery tank, you should:
never use thick cloth to touch the radiator cap.
turn the radiator cap quickly to the first stop.
wait until the engine has cooled before adding coolant.
keep the engine running while adding coolant.
5. When inspecting tanks, which of the following is the most important thing you should check for?
Exhaust pipes
6. To obtain the HazMat endorsement, you must pass a ________ background check.
Federal Bureau of Investigation
Local Department of Security
Law Enfrocement Agency
Transportation Security Administration
7. Excessive use of the service brakes results in overheating. Too much heat can:
cause the brakes to squeak.
make the brakes stop working.
cause the brakes to grab.
cause the brakes apply unevenly.
8. Letting air out of hot tires:
will cool the tires down.
will help relieve the extra pressure.
will have no effect on the tires.
should not be done, because the pressure will be too low when the tires cool off.
9. When checking the lights before driving:
you should turn off the engine.
the engine must be running.
make sure the parking brake is not set.
you should check them from inside the vehicle.
10. When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Coolant level in radiator
Windshield washer fluid level
Shock absorbers
Engine oil level
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DC CDL Tanker Endorsement

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