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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 Delaware CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The DE tanker test covers the following sections of the Delaware CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this DE tanker practice test now to prepare for the actual test!
1. Watch out for black ice:
when it is snowing.
any time the temperature is below freezing and the road looks wet.
when the temperature is above freezing and the road is dry.
right after it starts to rain.
2. Baffled liquid tanks:
help control the forward and backward liquid surge.
handle the same way as tankers without baffles.
make tank vehicles seem heavier than they really are.
help control side to side liquid surge.
3. Unbaffled tanks usually transport:
milk and other food products.
4. When checking the lights before driving:
make sure the parking brake is not set.
you should turn off the engine.
the engine must be running.
you should check them from inside the vehicle.
5. The best way to recognize that your trailer has started to skid is:
by opening the window and feeling the front of the mirror.
by seeing it in your mirrors.
by feeling the brakes come on.
by recognizing tire failure.
6. Skids caused by acceleration can usually be stopped by:
taking your foot off the accelerator.
swerving to the right.
swerving to the left.
applying the brakes firmly.
7. Brake lag is:
the amount of air pressure required to stop the vehicle.
the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
the distance your vehicle will travel, in ideal conditions, while you are braking.
the time required for the air brakes to work after the brake pedal is pushed.
8. Placards should be placed at least ______ away from any other markings.
7 inches
15 inches
6 inches
3 inches
9. In baffled tanks, the baffles help to control:
control the brakes.
the forward and backward liquid surge.
the side-to-side liquid surge.
the top-to-bottom liquid surge.
10. Most heavy-duty vehicles use:
solid brakes.
air brakes.
hydraulic brakes.
pressure brakes.
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DE CDL Tanker Test

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