AF Commercial Driving Theory Practice Questions - Afghanistan Driving License Theory Test - Commercial & Heavy Vehicle Exam

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At what air pressure must the low air pressure warning device (buzzer or red light) activate in a commercial air brake vehicle?

Before air pressure drops below approximately 60 PSI (around 4.1 bar) Only when air pressure reaches 0 PSI At 100 PSI Only when the vehicle comes to a complete halt

Correct Answer:

Before air pressure drops below approximately 60 PSI (around 4.1 bar)

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