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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 Missouri CDL tank vehicles test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MO tanker test covers the following sections of the Missouri CDL Manual: Driving Safely, Combination Vehicles, Tank Vehicles, Hazardous Materials. Take this MO tanker practice test now to prepare for the actual test!
1. A person attending a placarded parked vehicle:
must be in the vehicle, awake, or within 100 feet of the vehicle, and have the vehicle within clear view.
must know what to do in emergencies.
All of the above.
2. 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:
a person is killed.
spillage occurs.
black iceĀ makes the road look wet.
3. In newer vehicles with air brakes, you put on the parking brake:
placing the transmission in Park.
using a diamond-shaped, yellow, push-pull control knob.
using a P-shaped, yellow control knob.
4. When backing a trailer, you should turn the steering wheel to the right to make the trailer go left (or vice versa). Once the trailer starts to turn, you should:
keep backing up.
turn the wheel the other way to follow the trailer.
turn the wheel moreĀ  in the direction you want to go.
5. _________ are sometimes called "smooth bore" tanks.
Tanks made of aluminum
Unbaffled liquid tankers
Liquid tankers with baffles
6. Liquid surge occurs in:
empty tanks.
overfilled tanks.
partially filed tanks.
7. Column 2 in the Hazardous Material Table contains:
the HazMat description and shipping name.
the hazard class or division.
the identification numbers.
8. When backing, you should:
use the mirrors on both sides.
only use mirror on the driver's side.
back quickly.
9. If you are carrying a heavy load that is slowing you down, you should:
drive in the left lane.
drive on the shoulder.
drive in the right lane.
10. What shape are placards used for transporting hazardous materials?
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MO CDL Tanker Test

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