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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
How can you test that the spring brakes are functioning properly?
A
Engage the air brake override
B
Apply the parking brake and continuously pump the brakes
C
Accelerate to 15 mph and slam on the brakes
D
Release the parking brake and continuously pump the brakes
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