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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
On large buses the low pressure warning signal will trigger at what psi?
A
60 to 65
B
100
C
80 to 85
D
60
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