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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. If a tank is leaking, you should:
continue the trip until you can pull into a service station.
flash your brake lights to warn other motorists.
get the leak fixed immediately.
call your dispatcher or supervisor for instructions.
2. The height of the vehicle's center of gravity:
should only be a concern when loading a vehicle.
is very important for safe handling.
should only be a concern when driving in high winds.
should only be a concern when driving a vehicle.
3. Letting air out of hot tires:
will cool the tires down.
should not be done, because the pressure will be too low when the tires cool off.
will have no effect on the tires.
will help relieve the extra pressure.
4. After an accident, an improper use of flares could cause:
the springs to put on the brakes.
the vehicle to slide back and forth.
a fire if spilled fuel is on the ground.
air pressure to build from 50 to 100 psi within 2 minutes.
5. When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Windshield washer fluid level
Coolant level in radiator
Engine oil level
Spring hangers
6. Front-end header boards:
should never be used.
protect drivers from spilled cargo.
protect drivers from cargo in case of an accident or emergency stop.
reduce traction.
7. What should you do if you doubt you have safe space to pass under a low bridge?
If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
Go slowly, and take another route if you are not sure you can make it.
Increase the weight of your vehicle to clearing under the bridge.
Assume that the height posted at the bridges is correct.
8. Liquid surge results from movement of the liquid in partially filled tanks. Side-to-side surge can cause:
brake failure.
an automatic failure.
a rollover.
tire failure.
9. Placards must be placed:
on the front, rear and both sides of the vehicle.
on the rear only.
on the driver's side of the vehicle.
on the front only.
10. When driving a tanker, you should:
decrease your following distance.
stop every 50 miles to inspect your vehicle.
drive 10 mph below the posted speed limit.
increase your following distance.
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DE Tanker CDL Test

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