CDL Practice Tests
CDL Home Page
CDL Practice Test
General Knowledge
Air Brakes
Combination Vehicles
Doubles and Triples
Tanker Vehicles
Hazardous Materials
Transporting Passengers
Contact
Privacy Policy
Take a Practice Test
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
The low air pressure warning will sound when:
A
Air pressure falls below 60 psi
B
Air pressure falls below 50 psi
C
Air pressure falls to 0 psi
D
Air pressure falls below 100 psi
Next