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CDL Practice Test
General Knowledge
Air Brakes
Combination Vehicles
Doubles and Triples
Tanker Vehicles
Hazardous Materials
Transporting Passengers
CDL Air Brakes Practice Test
Question 1 of 3
What is the most common type of air brake?
A
C-clamp drum brake
B
S-cam drum brake
C
Disc brake
D
Wedge brake
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