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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 Texas CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The TX tanker test covers the following sections of the Texas CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this TX tanker practice test now to prepare for the actual test!
1. If you must drive slowly, how should you alert following drivers?
Turn on your taillights
Flash your brake lights
Use your emergency flashers if it is legal
Help them out by signaling when it is safe to pass
2. ABS will:
increase your average speed.
not change your normal braking capability.
not give you more control over the vehicle during braking.
shorten your stopping distance.
3. With a dual air brake system:
one system is the main braking system while the other is a back-up system.
each system shares the same lines and hoses.
each system shares air tanks.
each system has its own air tanks, hoses and lines.
4. The height of the vehicle's center of gravity:
should only be a concern when driving a vehicle.
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.
5. Tire load is defined as:
the weight transmitted to the ground by 1 tire.
the minimum safe weight a tire can carry at a specified pressure.
the minimum tire pressure.
the maximum safe weight a tire can carry at a specified pressure.
6. Hazardous materials include all of the following except:
7. What results from movement of the liquid in partially filled tanks?
Liquid flow through
Liquid splashes
Liquid waves
Liquid surge
8. Tank vehicles have a high center of gravity, which means:
they have more traction.
they are very stable.
they are more likely to roll over.
they are less likely to roll over.
9. Which of the following is not a place where the shipping papers may be kept?
In a pouch on the passenger's door
In a pouch on the driver's door
On the driver's seat when out of the vehicle.
In clear view within reach while driving.
10. Baffles:
help to control the side-to-side liquid surge.
separate the load.
help to prevent cargo overload.
help to control the forward and backward liquid surge.
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TX CDL Tanker Endorsement

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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