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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
A supply pressure gauge is used for:
A
To check tire pressure
B
To check air line pressure
C
To check for air leaks
D
To check air tank pressure
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