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Commercial Drivers License Exam Prep

Category - CDL

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The low air pressure warning must come on if the pressure reaches?

60 psi
55 psi
155 psi
75 psi

Explanation

Answer: A - On commercial vehicles that use air brakes, the low pressure warning must come on if the pressure reaches 60 psi or less. The warning is usually in the form of a light and buzzer. If the warning signal comes on, drivers must take immediate action to find out the cause of the warning.

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