LK DMT Heavy Vehicle Written Practice Questions - Sri Lanka Department Of Motor Traffic Heavy Vehicle Written Test Exam

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At what air pressure should the low air pressure warning buzzer or light activate in a heavy vehicle equipped with air brakes?

Around 20 to 30 psi Around 55 to 60 psi Around 100 to 120 psi Around 150 to 180 psi

Correct Answer:

Around 55 to 60 psi

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