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CDL Practice Test
General Knowledge
Air Brakes
Combination Vehicles
Doubles and Triples
Tanker Vehicles
Hazardous Materials
Transporting Passengers
CDL Hazardous Materials Practice Test
Question 1 of 3
When a placarded vehicle is refueling, someone must always be:
A
Within arm's reach of a fire extinguisher
B
Within site of the nozzle
C
Within 20 feet of the vehicle
D
At the nozzle controlling the fuel flow
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